text stringlengths 49 10.4k | source dict |
|---|---|
python, python-3.x, networking
def exit(self):
self.socket.close()
sys.exit(0)
def read(self, connection, length=1024):
response = b""
while True:
data = connection.recv(length)
response += data
if len(data) < length:
break
... | {
"domain": "codereview.stackexchange",
"id": 32864,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, python-3.x, networking",
"url": null
} |
One way to avoid this error is to make sure you take each pair of vectors in your cross products in the same “direction” around the triangle. For example, you can take $$A\times B,$$ $$B\times C,$$ and $$C\times A.$$ Alternatively, you can reverse all three of the cross products. If you use a different method to find t... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9653811631528337,
"lm_q1q2_score": 0.8534348612366275,
"lm_q2_score": 0.8840392725805822,
"openwebmath_perplexity": 205.27356870463893,
"openwebmath_score": 0.7603282928466797,
"ta... |
control-engineering, control-theory, systems-engineering
Title: Doubt on zero pole cancellation I am looking at a control system which has an unstable pole in the process. The transfer functions of process and controller are the following:
G = 10/((s+10)*(s-1));
K1 = 4*(s+1)/s;
where G is the process and K1 is the co... | {
"domain": "engineering.stackexchange",
"id": 3062,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "control-engineering, control-theory, systems-engineering",
"url": null
} |
(1\times3\times7\times9)^{\left\lfloor\frac{n}{10}\right\rfloor}\times\epsilon\equiv 9^{\left\lfloor\frac{n}{10}\right\rfloor}\times\epsilon$, where $\epsilon$ is either $1$, $3$ or $9$ depending on $n$ the last digit of $n$. These two reduction rules together with the modular reduction of $n\underset{5}{!}$ cut the si... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9863631679255075,
"lm_q1q2_score": 0.8441800413421596,
"lm_q2_score": 0.8558511396138365,
"openwebmath_perplexity": 432.1386783752567,
"openwebmath_score": 0.9818198680877686,
"tag... |
So yeah, you should be able to take it from here.
3. Jul 15, 2009
### complexnumber
snipez90, thanks for your reply.
Continue from your RHS, I get
\begin{align*} |(x-1)(1+2i) + i (y + 1)| =& \left|(1+2i) [(x-1) + \frac{i(y+1)}{1 + 2i}] \right| \\ =& |1+2i| \left| (x-1) + \frac{i(y+1) (1 - 2i)}{(1 + 2i) (1 - 2i)} \r... | {
"domain": "physicsforums.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9736446479186301,
"lm_q1q2_score": 0.8134640723306915,
"lm_q2_score": 0.8354835350552604,
"openwebmath_perplexity": 2174.9689708746373,
"openwebmath_score": 0.9902302026748657,
"ta... |
performance, c, image, signal-processing, opencl
/* Create Command Queue */
command_queue = clCreateCommandQueue(context, device_id, 0, &ret);
/* Create kernel from source */
program = clCreateProgramWithSource(context, 1, (const char **)&source_str, (const size_t *)&source_size, &ret);
ret= clBuildProgram(program, ... | {
"domain": "codereview.stackexchange",
"id": 28028,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "performance, c, image, signal-processing, opencl",
"url": null
} |
by: swearingen ®. W = total uniform load, lbs. Continuous Beam with Point Loads. Say I have the following beam: I want to calculate the reactions at the supports. Problem Statement: A uniform live load of 10 kN/m and a single concentrated force of 120 kN are to be subjected on the beam. Feb 3, 2015 - A step-by-step gui... | {
"domain": "borsatartufi.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9843363549643401,
"lm_q1q2_score": 0.8024629836453975,
"lm_q2_score": 0.8152324960856175,
"openwebmath_perplexity": 1085.5195220216592,
"openwebmath_score": 0.5917686820030212,
"tags... |
# Showing that rationals have Lebesgue measure zero.
I have been looking at examples showing that the set of all rationals have Lebesgue measure zero. In examples, they always cover the rationals using an infinite number of open intervals, then compute the infinite sum of all their lengths as a sum of a geometric seri... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9732407137099625,
"lm_q1q2_score": 0.8131266019169475,
"lm_q2_score": 0.8354835452961425,
"openwebmath_perplexity": 192.08312625705105,
"openwebmath_score": 0.9250035285949707,
"ta... |
error-correction, linear-algebra, nielsen-and-chuang, projection-operator
Title: How to find projection operators for spectral decomposition I am a little bit confused about the spectral decomposition for the observable $Z_{1}Z_{2}$ in Section $10.1$ of Nielsen and Chunag's "Quantum Computation and Quantum Information... | {
"domain": "quantumcomputing.stackexchange",
"id": 5386,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "error-correction, linear-algebra, nielsen-and-chuang, projection-operator"... |
species-identification, entomology
Title: Bug on wall identification request I've been finding a few of these on the same wall of my apartment the path month. Size is maybe 3-5 mm.
I live in an apartment in Toronto Canada.
Thanks in advance! Without clearer photos it is pretty hard to say, however, I think it is likel... | {
"domain": "biology.stackexchange",
"id": 11835,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "species-identification, entomology",
"url": null
} |
- 3 years, 10 months ago
Thanks appreciate it!
- 3 years, 10 months ago
Hey nice proofs! :) I did the Inductive one but didn't think of using a direct one
- 3 years, 10 months ago
Thanks! Yeah after I did the induction, I figured there was probably a way to directly show it, given that factorials are just products... | {
"domain": "brilliant.org",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9850429169195593,
"lm_q1q2_score": 0.8610035861086184,
"lm_q2_score": 0.8740772318846386,
"openwebmath_perplexity": 3539.271385194643,
"openwebmath_score": 0.9979040026664734,
"tag... |
ros
* /move_group/planner_configs/SPARSkConfigDefault/stretch_factor: 3.0
* /move_group/planner_configs/SPARSkConfigDefault/type: geometric::SPARS
* /move_group/planner_configs/SPARStwokConfigDefault/dense_delta_fraction: 0.001
* /move_group/planner_configs/SPARStwokConfigDefault/max_failures: 5000
* /move_group/p... | {
"domain": "robotics.stackexchange",
"id": 28240,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros",
"url": null
} |
electrostatics, classical-electrodynamics
Title: Heat produced when dielectric inserted in a capacitor When a capacitor is connected to battery, it stores $\frac{C V^2}{2}$, while battery supplied $CV^2$ energy. Therefore, $\frac{C V^2}{2}$ energy gets lost as heat. When a capacitor is already charged and a dielectric... | {
"domain": "physics.stackexchange",
"id": 45938,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electrostatics, classical-electrodynamics",
"url": null
} |
Let $A_{2n}$ the $2n\times 2n$ matrix defined by $(A_{2n})_{i,j} = \begin{cases} 1&\mbox{if }i<j\\ 0&\mbox{if }i=j\\ -1&\mbox{if } j>i \end{cases}$. We can show the result by induction. The case $n=1$ and $n=2$ has been solved. Now, we can write $A_{2n+2}=\begin{pmatrix}A_{2n}&B\\-B^t &C\end{pmatrix}$ where $B$ is a $2... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9830850897067342,
"lm_q1q2_score": 0.8213514100353635,
"lm_q2_score": 0.8354835391516132,
"openwebmath_perplexity": 194.72943903705743,
"openwebmath_score": 0.9703025817871094,
"ta... |
python, python-2.x, caesar-cipher
print """
...
So the word \"cat\" becomes \"fdw\"
\nThis script can encrypt and decrypt messages
based on this rule.
"""
You do not need to escape quotes inside a triple quoted string. And you can write line breaks just as literal linebreaks:
print """
...
So the word "cat" becomes "... | {
"domain": "codereview.stackexchange",
"id": 15832,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, python-2.x, caesar-cipher",
"url": null
} |
group-theory, representation-theory, lie-algebra, spinors, clifford-algebra
Have I made a mistake somewhere in my understanding? If not, what justifies the claim often seen in physics books that "every Dirac spinor can be written as two Weyl spinors"? Your notion that a "spinor comes from an element in the Clifford al... | {
"domain": "physics.stackexchange",
"id": 98745,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "group-theory, representation-theory, lie-algebra, spinors, clifford-algebra",
"u... |
series with MATLAB. This MATLAB function returns the Fourier Transform of f. I am implementing the 2D Discrete Fourier Transform in Matlab using matrix multiplications. Implementing Fast Fourier Transform Algorithms of Real-Valued Sequences With the TMS320 DSP Platform Robert Matusiak Digital Signal Processing Solution... | {
"domain": "asso-agrobiotech.fr",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9814534333179649,
"lm_q1q2_score": 0.8091709798159656,
"lm_q2_score": 0.8244619177503205,
"openwebmath_perplexity": 752.9457626227579,
"openwebmath_score": 0.7412744760513306,
"t... |
# Binomial Theorem Inductive Proof - a reindexing moment
I'm copying a proof from someone else and they make this move I don't feel comfortable with. So in the inductive step we assume $${ \left( x+y \right) }^{ n }= \sum _{ m=0 }^{ n }{ \left( \begin{matrix} n \\ m \end{matrix} \right) } { x }^{ m }{ y }^{ n-m }$$, m... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9643214460461697,
"lm_q1q2_score": 0.8097734720659208,
"lm_q2_score": 0.8397339656668287,
"openwebmath_perplexity": 150.83683387493105,
"openwebmath_score": 0.8710566163063049,
"ta... |
by the binomial theorem.
Another way for combinatorially-minded people:
$$\sum_{k=0}^n (-1)^k \binom{n}{k} = 0$$
is the number of ways to flip n coins and get an even number of heads, minus the number of ways to flip n coins and get an odd number of heads. Since the parity of the number of heads will always come dow... | {
"domain": "bootmath.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9865717424942962,
"lm_q1q2_score": 0.8263721827746667,
"lm_q2_score": 0.8376199592797929,
"openwebmath_perplexity": 157.90163419235367,
"openwebmath_score": 0.9815742373466492,
"tags": ... |
If two points $X,Y$ can be found in the same region $A_i$, then we also have $\angle XAY \le \frac{180°}n$. That means only one point can exist in each of the region $A_i$ (there are $n-2$ points and $n-1$ valid regions). Same for $B_j$.
$A_i$ and $B_j$ may overlap, though only when $i+j< n+2$ (a):
\begin{array}{c|cc... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9865717468373084,
"lm_q1q2_score": 0.86734135902434,
"lm_q2_score": 0.8791467643431002,
"openwebmath_perplexity": 321.4883431942435,
"openwebmath_score": 0.9971634149551392,
"tags"... |
c, parsing, functional-programming, lazy
static parser
token_parser( void ){
parser space = using( many( anyof( " \t\n" ) ), on_spaces );
parser alpha_ = plus( alpha(), chr('_') );
parser integer = using( some( digit() ), on_integer );
parser floating = using( SEQ( plus( SEQ( some( digit() ), chr... | {
"domain": "codereview.stackexchange",
"id": 34480,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c, parsing, functional-programming, lazy",
"url": null
} |
f$ and $g_2$ are inverses inverse of f, and we are done the. One-To-One correspondence if distinct elements of a bijection or a one-to-one correspondence there is a bijection finding... ] $is surjective, that f is bijective you may merely say ƒ bijective! On B g=i_B$ is an injection and $X\subseteq a$ is surjective if ... | {
"domain": "wolterskluwerlb.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9643214460461698,
"lm_q1q2_score": 0.8271641846356652,
"lm_q2_score": 0.8577681104440171,
"openwebmath_perplexity": 516.3134506144474,
"openwebmath_score": 0.9472898244857788,
"t... |
$\displaystyle (5a) \ \ \ \ \ e_X(d)=\frac{\sum \limits_{x \ge d} S_X(x) }{S_X(d)}$
$\displaystyle (5b) \ \ \ \ \ e_X(d)=\frac{\biggl(\sum \limits_{x>d} S_X(x)\biggr)+(w+1-d) S_X(w) }{S_X(d)}$
$\text{ }$
In both $(5a)$ and $(5b)$, we assume that the support of $X$ is the set of nonnegative integers. In $(5a)$, we as... | {
"domain": "wordpress.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9893474904166245,
"lm_q1q2_score": 0.8111594208263365,
"lm_q2_score": 0.8198933425148214,
"openwebmath_perplexity": 262.62715424159506,
"openwebmath_score": 0.9560127854347229,
"tags":... |
tinyxml, nodelet, macos, rosmake, macos-lion
return boost::shared_ptr<M>(new M);
^
/Users/luca/Software/ros/electric/ros_comm/clients/cpp/roscpp/include/ros/service_callback_helper.h:180:56: note: in instantiation of function template specialization 'ros::defaultServiceCreateFunction<nodelet::NodeletLoadRespo... | {
"domain": "robotics.stackexchange",
"id": 7517,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "tinyxml, nodelet, macos, rosmake, macos-lion",
"url": null
} |
\eqalign{ {f(x_0)+f(x_1)\over2}\Delta x&+{f(x_1)+f(x_2)\over2}\Delta x+\cdots+ {f(x_{n-1})+f(x_n)\over2}\Delta x=\cr &\left({f(x_0)\over2}+f(x_1)+f(x_2)+\cdots+f(x_{n-1})+{f(x_n)\over2}\right) \Delta x.\cr}
This is usually known as the Trapezoid Rule. For a modest number of subintervals this is not too difficult to do... | {
"domain": "libretexts.org",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9911526457010864,
"lm_q1q2_score": 0.8126394512643513,
"lm_q2_score": 0.8198933381139645,
"openwebmath_perplexity": 240.31652133487623,
"openwebmath_score": 0.9267662167549133,
"tags"... |
graphs, terminology, minimum-spanning-tree
Title: MST: Are all safe edges, light edges? Following are some definitions from CLRS:
DEFINITIONS :
1. Cut (S ,V-S) : of an undirected graph G = (V,E) is a partition of V(as defined in CLRS Book) .You can think it as a line that divides graph into two disjoint sets of ver... | {
"domain": "cs.stackexchange",
"id": 8755,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "graphs, terminology, minimum-spanning-tree",
"url": null
} |
turing-machines, computability, undecidability, discrete-mathematics, church-turing-thesis
If $e \not\in \text{TOT}$, then $\exists x \in \{0,1\}^*$ such that $e(x)$ does not halt. Then $\exists x$, such that $\forall y \in \mathbb{N}$, $(e, x, y) \not\in B$, showing that if is false that $\forall x \in \{0,1\}^*, \ex... | {
"domain": "cs.stackexchange",
"id": 16082,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "turing-machines, computability, undecidability, discrete-mathematics, church-turing-the... |
beginner, form, react.js, jsx
var newFilteredUnselected = this.state.filteredUnselectedObjects.slice()
newFilteredUnselected.splice(index, 1)
this.setState({
selectedObjects: newSelected,
unselectedObjects: newUnselected,
filteredUnselectedObjects: newFilteredUnselected
});
}
handle... | {
"domain": "codereview.stackexchange",
"id": 32741,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "beginner, form, react.js, jsx",
"url": null
} |
Now look at the third decimal place:
$\textcolor{b l u e}{6} .3 \textcolor{m a \ge n t a}{7} \textcolor{\lim e g r e e n}{0} 0 \text{ } \leftarrow$ this is smaller $\left(0\right)$
$\textcolor{b l u e}{6} .3 \textcolor{m a \ge n t a}{7} \textcolor{\lim e g r e e n}{7} 2 \text{ } \leftarrow$ this is bigger $\left(7\rig... | {
"domain": "socratic.org",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9814534311480467,
"lm_q1q2_score": 0.8157282022529095,
"lm_q2_score": 0.831143054132195,
"openwebmath_perplexity": 680.9185383354798,
"openwebmath_score": 0.49124038219451904,
"tags": n... |
java, recursion
Title: Print the Twelve Days of Christmas without loops or conditionals For my AP Computer Science class, I am required to write a program that prints the Twelve Days of Christmas without loops or conditionals using static methods.
public class TwelveDaysOfChristmas {
public static final String[] ... | {
"domain": "codereview.stackexchange",
"id": 17231,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, recursion",
"url": null
} |
matlab, fft, phase, linear-phase
Title: matlab fft phase response square wave I am new to phase analysis, recently I have been trying compare the phase between the input signal and output signal of a system. From the code below, I simulated a square wave and plotted the phase, from basic theory, I thought that since t... | {
"domain": "dsp.stackexchange",
"id": 2517,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "matlab, fft, phase, linear-phase",
"url": null
} |
algorithms, time-complexity, knapsack-problems
Title: Is there an $O(n^2)$ or $O(n^3)$ time algorithm to check if a number is a sum of $k$ elements of sorted array?
Let $A$ be a sorted array of $n$ positive integers (sorted in non-decreasing order, that is there can be equal consecutive elements). Can we check whethe... | {
"domain": "cs.stackexchange",
"id": 11585,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "algorithms, time-complexity, knapsack-problems",
"url": null
} |
ApplicationMatrix initialization order*Transform styleLanguageExample (translate by x=10,y=20,z=30)
BlenderRow-majory=AxPython
cube.matrix_local = Matrix( ((1,0,0,10),(0,1,0,20),(0,0,1,30),(0,0,0,1)) )
MayaRow-majory=xAMEL, Python
cmds.setAttr('pCube1.offsetParentMatrix', [1,0,0,0, 0,1,0,0, 0,0,1,0, 10,20,30,1], type='... | {
"domain": "otterstack.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9869795121840872,
"lm_q1q2_score": 0.8203211640585232,
"lm_q2_score": 0.8311430520409023,
"openwebmath_perplexity": 2971.5895878376386,
"openwebmath_score": 0.5106235146522522,
"tags"... |
special-relativity, mass-energy, observers, stress-energy-momentum-tensor, thought-experiment
Title: Thought experiment and $E=mc^2$ Suppose we have an indestructible box that doesn't let through any matter or radiation or whatever. In the box, there is matter which is evenly distributed (state A). The energy conten... | {
"domain": "physics.stackexchange",
"id": 82248,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "special-relativity, mass-energy, observers, stress-energy-momentum-tensor, thought... |
feature-selection, cross-validation, class-imbalance, gradient-boosting-decision-trees
Title: Steps of multiclass classification problem So this question is more theoretical, than a practical one. I got a dataframe with 4 classes of cars' body types (e.g. sedan, hatchback, etc.) and different characteristics (doors, s... | {
"domain": "datascience.stackexchange",
"id": 10096,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "feature-selection, cross-validation, class-imbalance, gradient-boosting-decisi... |
c++
Now you can simply do this:
void print_brown_numbers(int limit)
{
for (unsigned int i = 2; i <= limit; ++i)
{
unsigned int fact = factorial(i);
if (is_perfect_square (fact + 1))
{
std::cout << sqrt(fact + 1) << " " << i << " are brown numbers\n";
}
}
}
Note ... | {
"domain": "codereview.stackexchange",
"id": 29141,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++",
"url": null
} |
proteins, vaccination, mrna
Title: Does the mRNA of the covid19 spike protein contain any nuclear localization signals Does the covid19 spike protein amino acid sequence, as used in the covid19 vaccines, contain a nuclear localization signal. Because if they do, isn't there a chance that the RNA can find its way to th... | {
"domain": "biology.stackexchange",
"id": 11302,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "proteins, vaccination, mrna",
"url": null
} |
Then $$f$$ wouldn't be continuous at $$x=1$$, and MVT wouldn't apply.
Let $$S \subset \mathbb R$$, and let $$f:S \to \mathbb R$$. To say that $$f$$ is continuous at a point $$a \in S$$ means that if $$\epsilon > 0$$, then there exists $$\delta > 0$$ such that if $$x \in S$$ and $$|x - a| < \delta$$ then $$|f(x) - f(a)... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9637799441350253,
"lm_q1q2_score": 0.8010390062797412,
"lm_q2_score": 0.831143054132195,
"openwebmath_perplexity": 98.30129654301639,
"openwebmath_score": 0.9577867388725281,
"tags... |
and succeeding in transforming this infinity product into an integral, extending the factorial beyond integers, upon noticing that for certain values the infinite product yielded $$\pi,$$ suggesting areas of a circle.
But there is a really neat intuition already expressed in one of the answers, and beautifully present... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.977713811213884,
"lm_q1q2_score": 0.829069785073634,
"lm_q2_score": 0.8479677545357568,
"openwebmath_perplexity": 806.043757788032,
"openwebmath_score": 0.9317984580993652,
"tags":... |
equilibrium
Title: What is meant by a reaction favours one side? I frequently see in textbooks the phrase, a reaction favours the left/right side, but don't know what this means. Does this mean the equilibrium shifts to one side? Yes, the equilibrium shifts as per Le-Chatelier Principle. Le Châtelier's principle state... | {
"domain": "chemistry.stackexchange",
"id": 10144,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "equilibrium",
"url": null
} |
cosmology, mass, universe, mass-energy
Title: Will the universe reach zero mass? I was reading Phil Plait's 'Death from the skies' where it describes the fate of the universe. It describes the period from 10^90 years to infinity as the "dark age" when all the of the black holes have disappeared.
In this state the univ... | {
"domain": "physics.stackexchange",
"id": 34462,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "cosmology, mass, universe, mass-energy",
"url": null
} |
python, performance, vectors, easing
def easeInQuad(self, rhs, scalar):
'''Quadratic easing'''
return self.lerp(rhs, scalar**2)
def easeOutQuad(self, rhs, scalar):
'''Quadratic easing'''
return self.lerp(rhs, 1 - (1 - scalar)**2)
def easeInOutQuad(self, rhs, scalar):
'... | {
"domain": "codereview.stackexchange",
"id": 44206,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, performance, vectors, easing",
"url": null
} |
special-relativity, time-dilation
Title: Effects of time dilation on particles According to time dilation, having 2 clocks, 1 further than the other from a gravitational center, makes the clocks run differently in respect to each other.
My question is, what exactly happens at a microscopic level? Does the space-time s... | {
"domain": "physics.stackexchange",
"id": 79371,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "special-relativity, time-dilation",
"url": null
} |
Exercise 04.5 (functions and passing functions as arguments)
Restructure your program from the bisection exercise in Activity 02 to
• Use a Python function to evaluate the mathematical function $f$ that we want to find the root of;
and then
• Encapsulate the bisection algorithm inside a Python function, which takes... | {
"domain": "notebook.community",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9763105300791783,
"lm_q1q2_score": 0.8071274236393652,
"lm_q2_score": 0.8267117876664789,
"openwebmath_perplexity": 6813.429668322972,
"openwebmath_score": 0.6399338245391846,
"ta... |
classical-mechanics, differential-geometry, classical-field-theory, diffeomorphism-invariance
&=\int_{\alpha}^{\beta}d\tau\frac{d\phi_{\epsilon}(\tau)}{d\tau}L\left(q(\phi_{\epsilon}(\tau)),\frac{dq(\phi_{\epsilon}(\tau))}{d\tau}\frac{d\tau}{d\phi_{\epsilon}(\tau)},\phi_{\epsilon}(\tau)\right) \\
&=\int_{\alpha}^{\bet... | {
"domain": "physics.stackexchange",
"id": 85778,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "classical-mechanics, differential-geometry, classical-field-theory, diffeomorphism... |
the result of multiplying two matrices is another matrix. How to input and multiply two matrix using pointer in C programming. The first element of C can be obtained by taking the first row of A and first column of B, multiplying them element by element and summing the result. In algebraic notation, widely used in math... | {
"domain": "innoqua-handwerk.de",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.982287697148445,
"lm_q1q2_score": 0.8248603413823101,
"lm_q2_score": 0.8397339636614178,
"openwebmath_perplexity": 384.6809315355939,
"openwebmath_score": 0.7845232486724854,
"ta... |
general-relativity, black-holes, time, observers, event-horizon
Title: Black hole formation as seen by a distant observer
Possible Duplicate:
How can anything ever fall into a black hole as seen from an outside observer?
Is black hole formation observable for a distant observer in finite amount of time? Specificall... | {
"domain": "physics.stackexchange",
"id": 5801,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "general-relativity, black-holes, time, observers, event-horizon",
"url": null
} |
java, game-of-life, simulation
private <T extends Occupant> int countNeighbors(Class<T> type) {
int count = 0;
for (Cell c : getNeighbors()) {
if (type.isInstance(c.getOccupant())) {
count++;
}
}
return count;
}... | {
"domain": "codereview.stackexchange",
"id": 6547,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, game-of-life, simulation",
"url": null
} |
ruby, ruby-on-rails
Title: Creating user accounts as an administrative user I have a site where user accounts can be created in two ways: by new users (sign up) and by admin users. Since the creation is handled differently in each case, I decided to split the logic into two separate functions. I have a working impleme... | {
"domain": "codereview.stackexchange",
"id": 7210,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ruby, ruby-on-rails",
"url": null
} |
quantum-computer
In qubit 1, $\hat\sigma_y.\hat\sigma_x$ simplifies to $i\hat\sigma_z$
In qubit 1, $\hat\sigma_z.\hat\sigma_x$ simplifies to $i\hat\sigma_y$
In qubit 4, $\hat\sigma_x.\hat\sigma_x$ simplifies to $\hat 1$
In qubit 5, $\hat\sigma_x.\hat\sigma_y$ simplifies to $i\hat\sigma_z$
Therefore, we have:
$\hat q_... | {
"domain": "physics.stackexchange",
"id": 26011,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-computer",
"url": null
} |
photoelectric-effect
Title: Why do electrons eject only if the frequency of incident ray is greater than the threshold frequency? Why do the electrons start moving even if the dim light (less intense) of a specific frequency falls on the material ? Because the light is absorbed mostly as single photons. Two-photon abs... | {
"domain": "physics.stackexchange",
"id": 17481,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "photoelectric-effect",
"url": null
} |
pcl, external-libraries, ros-fuerte, pandaboard, source
I hope I saved someones time :)
patch:
Because I can't upload a patch file. Just copy this into a new createt file named pcl17_trunk.patch
Index: manifest.xml
===================================================================
--- manifest.xml (revision 40052)... | {
"domain": "robotics.stackexchange",
"id": 9934,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "pcl, external-libraries, ros-fuerte, pandaboard, source",
"url": null
} |
quantum-field-theory, standard-model, feynman-diagrams, electroweak, pions
For the decay $\pi^+ \to \mu^+ \nu_\mu$ one has to compute the S-matrix element
$\langle \mu^+(q_1) \nu_\mu(q_2)| S |\pi^+(p)\rangle = \frac{iG_F}{\sqrt{2}}\int d^4 x \, \langle\mu^+(q_1) \nu_\mu(q_2)| J^\mu(x) J_\mu^\dagger(x)| \pi^+(p)\rang... | {
"domain": "physics.stackexchange",
"id": 92477,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-field-theory, standard-model, feynman-diagrams, electroweak, pions",
"ur... |
c#, reflection
Title: Use reflection to check for class methods with a custom attribute This code is within a ViewModelBase class. I have a custom attribute defined that is meant to trigger methods when a property is changed. The following runs as the ViewModel is being constructed. The idea is to catalog the metho... | {
"domain": "codereview.stackexchange",
"id": 30608,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c#, reflection",
"url": null
} |
special-relativity, mathematics
Lorentz transformations are a special subset of $End(T_pM)$ (the set of endomorphisms on the tanget space), namely those that are invertible and leave the norm of a 4-vector invariant. Since $End(T_pM) \cong T^1_1(T_pM)$ we can see our Lorentz transformation as a map $\Lambda$ that eats... | {
"domain": "physics.stackexchange",
"id": 81585,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "special-relativity, mathematics",
"url": null
} |
c++, c, c++11, primes, comparative-review
The at() method is a checked access to the member. It validates your index is in range (you don't do this in the C code).
if (sieve->at(i)) continue;
Unless you are using unvalidated user input there is little need to use the at() method, prefer to use operator[].
In ... | {
"domain": "codereview.stackexchange",
"id": 20050,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, c, c++11, primes, comparative-review",
"url": null
} |
biochemistry, terminology, proteins
Title: What does "parallel in-register" mean for a protein structure in a fibril? I read a paper by Ross and Poirier [1, p. S12] which has the following lines (see section Commonalities of amyloid structure) that describe the structure of protein in a fibril:
The most extensively c... | {
"domain": "chemistry.stackexchange",
"id": 12781,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "biochemistry, terminology, proteins",
"url": null
} |
mars, obliquity
Title: Why don't we see evidence of glaciation on Mars, similar to Earth's Ice Ages? With all recent NASA activity surrounding Mars manned missions, it is surprising that given Mars orbital distance from Sun that there is not evidence of massive glaciation similar to Earth's Ice Ages. Also Mars alleged... | {
"domain": "astronomy.stackexchange",
"id": 3922,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "mars, obliquity",
"url": null
} |
java, unit-testing, primes, error-handling, junit
Title: Testing a probabilistic prime-testing algorithm that may fail I have implemented Pollard's Rho algorithm in Java. Due to the nature of it there is a small chance for it to fail (have not seen it happening yet).
Since I do not want to see my unit tests failing du... | {
"domain": "codereview.stackexchange",
"id": 32684,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, unit-testing, primes, error-handling, junit",
"url": null
} |
c, generics, queue
if (queue->size == 0) {
return;
}
That's unnecessary, since the rest of the function is a for loop that will do nothing when size is zero. We can just omit this test.
One thing missing that I would have liked to have seen is a comprehensive set of unit tests. It's much better to demonstrat... | {
"domain": "codereview.stackexchange",
"id": 40718,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c, generics, queue",
"url": null
} |
java, json, wrapper
/*
* guarantees to return a valid JsonObject containing data about the specified movie/tv-show
* returns null if the movie/tv-show does not exist on the TMdb servers or an error occurs while
* retrieving the JsonObject
*
* @param mediaType Media type as a string ("movie" or... | {
"domain": "codereview.stackexchange",
"id": 37333,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, json, wrapper",
"url": null
} |
$$kt+C=\ln|P|-\ln|1-P|=\ln|\frac{P}{1-P}|$$ So we have: $$P(t)=\frac{\exp(kt+C)}{1+\exp(kt+C)},~~\text{or}~~P(t)=\frac{\exp(kt+C)}{-1+\exp(kt+C)}$$
• thank you, i have completed this question :) – Panthy Jul 29 '14 at 22:14
• This shows that $P\to 1$, but it is useful to know (1) how to read that off quickly from the ... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9828232919939075,
"lm_q1q2_score": 0.8058102739743052,
"lm_q2_score": 0.8198933425148214,
"openwebmath_perplexity": 228.65324140534324,
"openwebmath_score": 0.8974603414535522,
"ta... |
at this point is equal to-- and we assume that the wire's going through air or a vacuum-- the permeability of free space-- that's just a constant, though it looks fancy-- times the current times 2 amperes divided by 2 pi r. However, the law also applies to infinitely long wires as used in the definition of the SI unit ... | {
"domain": "aoly.pw",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9715639644850629,
"lm_q1q2_score": 0.8075086305677752,
"lm_q2_score": 0.8311430436757312,
"openwebmath_perplexity": 686.7284100631799,
"openwebmath_score": 0.8189038634300232,
"tags": null,
... |
programming, circuit-construction
Title: How do I translate a quantum circuit for computing x + y mod 8 into a program?
I have made the above quantum circuit that gives the mod $8=2^3$
operation between $|x\rangle$ and $|y\rangle$. Now I want to write its corresponding program using some language. Where can I do that... | {
"domain": "quantumcomputing.stackexchange",
"id": 763,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "programming, circuit-construction",
"url": null
} |
history, dirac-equation, dirac-matrices
Where in the last step we have used the result of the original Dirac equation. Now, we can write the last equation as:
$$-\frac{1}{2}(\gamma^{\nu}\gamma^{\mu}+\gamma^{\mu}\gamma^{\nu})\partial_{\nu}\partial_{\mu}\psi=m^2\psi$$
We see that the term in the parenthesis is the well ... | {
"domain": "physics.stackexchange",
"id": 50059,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "history, dirac-equation, dirac-matrices",
"url": null
} |
kinematics, rotational-dynamics, oscillators
As to your logical deduction, I'm having trouble understanding it. You seem to be arguing that the object can't be in motion initially (in any direction—nothing in your argument is special to the $\phi$ direction so far as I can tell.) If that's true, then yes, $\dot{\phi... | {
"domain": "physics.stackexchange",
"id": 37017,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "kinematics, rotational-dynamics, oscillators",
"url": null
} |
fft, phase, delay
Title: Phase shift between two signals So I got some oscilloscope captures for a project I'm doing and I'd like to find a phase shift between them because I don't trust the scope calculation.
So I extracted data from a .csv file and loaded it into Matlab and now I'd like to find a phase shift using ... | {
"domain": "dsp.stackexchange",
"id": 4108,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "fft, phase, delay",
"url": null
} |
python, object-oriented, python-3.x, simulation
def neighbors(self, bounds, steps=1):
"""
Return a list of Coords that are the specified number of steps away in
each cardinal direction and that are in bounds.
"""
candidate_coords = [
Coords(self.x, self.y... | {
"domain": "codereview.stackexchange",
"id": 31481,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, object-oriented, python-3.x, simulation",
"url": null
} |
c#, cryptography, caesar-cipher
Symmetry
When you have methods that do symmetrical work (they are closely related), then you should ensure the parameter names are the same.... For example, you have:
public string Encrypt(string ReadIn, int Shift)
and
public string Decrypt(string ReadIn, int amountShift)
The secon... | {
"domain": "codereview.stackexchange",
"id": 7803,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c#, cryptography, caesar-cipher",
"url": null
} |
matlab, filters, filter-design
Title: Latency handling at filter output In MATLAB, latency at the start of the output of a filter can be handled by discarding those bits and starting the signal where the latency ends. but how can the garbage value at the end be handled? You may use the internal state variable zf that ... | {
"domain": "dsp.stackexchange",
"id": 5155,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "matlab, filters, filter-design",
"url": null
} |
experimental-chemistry, home-experiment
was the precipitate really $\ce{CuO}$ (if so, how to avoid creating it, i.e. what are the necessary conditions for $\ce{Cu(OH)2}$ creation here), and what is the easiest way to check for $\ce{CuO}$ presence in general?
how efficient should be a properly done homemade Schweizer's... | {
"domain": "chemistry.stackexchange",
"id": 7006,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "experimental-chemistry, home-experiment",
"url": null
} |
c, parsing, linux, status-monitoring, x11
if (snd_mixer_close(handle))
SND_ERR("Error Close")
handle = NULL;
snd_config_update_free_global();
return 0;
}
static int
get_battery(void)
{
if (!memset(battery_string, '\0', 32))
ERR(battery_string, "Error resetting battery_string")
/* ... | {
"domain": "codereview.stackexchange",
"id": 31497,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c, parsing, linux, status-monitoring, x11",
"url": null
} |
# Prove that if $a\in [0,1]$, then $\lim\limits_{x \to a} f(x) =0$
Supose that for any natural number $n$, $A_n$ is a finite set of numbers from $[0,1]$, and that $A_m$ and $A_n$ have no common elements if $m \neq n$, ie
$$m \neq n \Rightarrow A_n\cap A_m=\emptyset$$
Let $f$
$$f(x)= \begin{cases} 1/n & \text{for } ... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9755769092358046,
"lm_q1q2_score": 0.8086935605678178,
"lm_q2_score": 0.8289388083214156,
"openwebmath_perplexity": 184.4115044239375,
"openwebmath_score": 0.95234215259552,
"tags"... |
is possible to obtain a graphical information about general behavior of the solution curves (call trajectories) from the. This diagram show schematically the different types of solutions. Related Links Eigenvalue (Wolfram MathWorld) Phase Portrait (Wolfram MathWorld) Permanent Citation. the powerful Maple 10 graphics t... | {
"domain": "mariasaso.de",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9852713883126862,
"lm_q1q2_score": 0.8252829801580173,
"lm_q2_score": 0.8376199592797929,
"openwebmath_perplexity": 682.0292663282,
"openwebmath_score": 0.6334644556045532,
"tags": null... |
c++, strings, reinventing-the-wheel
We are dealing with characters and thus construction and destruction are completely irelavant to a string.
Fundamental flaw in your design is that you don't keep track of the string size as a member of the class. You re-calculate it every time by searching along the string looking f... | {
"domain": "codereview.stackexchange",
"id": 6232,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, strings, reinventing-the-wheel",
"url": null
} |
image-processing, signal-detection
file <- "Q26593_original.png"
library(png)
library(EBImage)
img <- readPNG(file)
d <- dim(img)
#xx <- (0:(d[2]-1) - d[2]/2)/d[2]
#yy <- (0:(d[1]-1) - d[1]/2)/d[1]
#sigma <- 0.2
#w <- exp(-yy*yy/sigma) %*% t(exp(-xx*xx/sigma))
#w1 <- exp(-yy*yy/sigma) %*% t(rep(1,d[2]))
f <- ... | {
"domain": "dsp.stackexchange",
"id": 3214,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "image-processing, signal-detection",
"url": null
} |
newtonian-mechanics, geometry
Title: How a wedge is two inclined planes? All sources say a wedge is simply two inclined planes. I see how this is true geometrically, but I don't get how this is true functionally.
In an inclined plane, the amount of force required to be applied is reduced but the distance over which... | {
"domain": "physics.stackexchange",
"id": 63188,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "newtonian-mechanics, geometry",
"url": null
} |
php, beginner, mysql
mysqli_close($database); I think there are two major issues you should address right in the beginning when you start with PHP.
Separation of Layout and Logic
This means in general that you shouldn't mix HTML and PHP code. Later this will lead you to the MVC-Pattern.
index.php
<?php
// connect to d... | {
"domain": "codereview.stackexchange",
"id": 4275,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "php, beginner, mysql",
"url": null
} |
functional-programming, scheme
(print_primes (list_primes 4095)) Your algorithm is okay, but the real issue with this code is that your code style is atrocious, bordering on unreadable. Your style exhibits four main problems:
Scheme is not C, and parentheses are not curly braces. Do not put close parens on separate l... | {
"domain": "codereview.stackexchange",
"id": 24361,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "functional-programming, scheme",
"url": null
} |
complexity-theory, time-complexity, np-complete, np
Could it be that the optimal algorithm for $L$ is exponential?
That could very well be. Factoring is in $\textsf{NP} \cap \textsf{coNP}$ [2], and we don't believe there exists a polynomial time algorithm for Factoring.
What is the definition of P, NP, NP-complete ... | {
"domain": "cs.stackexchange",
"id": 15302,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "complexity-theory, time-complexity, np-complete, np",
"url": null
} |
c#, rock-paper-scissors
To compliment this class, a static storage class(Messages) to put names to the various messages that will be required. I put a simple print method in there as well:
static class Messages
{
public static Message startMessage = new Message("", "Welcome to RockScissorPaper");
public stati... | {
"domain": "codereview.stackexchange",
"id": 36975,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c#, rock-paper-scissors",
"url": null
} |
I am breathing if and only if q ' '' instead of if and only q! Step of any truth table for biconditional pq represents p if and only if they are of length! Sentence: x + 2 = 7 if and only if y, ” x... 11 iff x = 5 '' is not biconditional, and a biconditional state the truth for. My attempt to explain these topics: impl... | {
"domain": "kanunpiyano.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9615338046748209,
"lm_q1q2_score": 0.8658898237682958,
"lm_q2_score": 0.9005297781091839,
"openwebmath_perplexity": 606.4229477217441,
"openwebmath_score": 0.4470146596431732,
"tags"... |
$\sqrt{33}$ isn't divisble by any of the other squares less than or equal to $16$ (we don't need to check any higher, as the only number greater than 16 = floor($\frac{33}{2}$) divisible by 33 is 33 itself), so it can't be simplified. (Floor(x) just means x - the decimal part of x). $\sqrt{96}$ is $\sqrt{4 \times 24} =... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9532750440288019,
"lm_q1q2_score": 0.8247965254134106,
"lm_q2_score": 0.8652240825770432,
"openwebmath_perplexity": 327.3758412422629,
"openwebmath_score": 0.8511563539505005,
"tag... |
electromagnetism, magnetic-moment
Title: Determining the location of magnetic moments The magnetic moment of a closed current loop is $$\mathbf{m} = \frac{I}{2}\int\mathbf{r}\times d\mathbf{r}.$$ Note that $\mathbf{m}$ is independent of any coordinate frame. How, then, does one determine the location of a magnetic m... | {
"domain": "physics.stackexchange",
"id": 10047,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electromagnetism, magnetic-moment",
"url": null
} |
thermodynamics, gravity, black-holes, orbital-motion, galaxies
Another type of “limit” for gravitational assists has been considered by Freeman Dyson in a paper
Dyson, Freeman. Gravitational machines. in Interstellar Communication, edited by AGW Cameron, (Benjamin Press, New York, 1963) (1963), free pdf.
This is a ... | {
"domain": "physics.stackexchange",
"id": 77042,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "thermodynamics, gravity, black-holes, orbital-motion, galaxies",
"url": null
} |
electromagnetism, magnetic-fields, electric-fields, electromagnetic-induction
You see that this leads to $ \vec{E}=\vec{0}$
In fact, the electric field must be zero because the rest of the circuit has zero resistance. There is no need for an electric field to move the charges there.
In a pictorial way, you can imagine... | {
"domain": "physics.stackexchange",
"id": 94907,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electromagnetism, magnetic-fields, electric-fields, electromagnetic-induction",
... |
lua, lua-table
Title: Lua and complex numbers I try to use complex numbers in a lua program.
I need to parse a table of complex numbers printing side by side the name of the complex number and its value. Can't get through it :
I don't ask how the library works.
require "complex"
a = complex.new (0,1)
b = complex.new ... | {
"domain": "codereview.stackexchange",
"id": 19889,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "lua, lua-table",
"url": null
} |
coordinate-systems, vectors
While doing so, we may set $\phi_2=0$ i.e. $y_2=0$ and the inner product reduces to
$$ x_1 x_2 + z_1 z_2 = r_1r_2 (\sin\theta_1\sin\theta_2 \cos\phi_1 + \cos\theta_1\cos\theta_2) $$
We may restore the form for a general rotation by replacing $\phi_1$ in the formula above by $\phi_1-\phi_2$ ... | {
"domain": "physics.stackexchange",
"id": 70890,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "coordinate-systems, vectors",
"url": null
} |
roscpp
Title: how to compile .cpp file for ros without main function?
Hi,
I have created a .cpp file for ros. where i have to put the file and how can i compile it. this file is a standalone file.
Originally posted by SAK on ROS Answers with karma: 94 on 2011-07-26
Post score: -3
Original comments
Comment by sam on... | {
"domain": "robotics.stackexchange",
"id": 6258,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "roscpp",
"url": null
} |
ros, tutorial, build
And my package.xml
<?xml version="1.0"?>
<package>
<name>a_vector_field</name>
<version>0.0.0</version>
<description>The a_vector_field package</description>
<license>TODO</license>
<buildtool_depend>catkin</buildtool_depend>
<build_depend>roscpp</build_depend>
<build_depend>visualiz... | {
"domain": "robotics.stackexchange",
"id": 28297,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros, tutorial, build",
"url": null
} |
javascript, beginner, object-oriented, ecmascript-6, polymorphism
Extra line breaks
In verses, you append an extra newline at the very end.
I would omit that because it is not necessary.
Function arguments
The verses function syntactically accepts an arbitrary number of arguments.
Actually, only a range of exactly two... | {
"domain": "codereview.stackexchange",
"id": 28821,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "javascript, beginner, object-oriented, ecmascript-6, polymorphism",
"url": nu... |
java, algorithm, statistics, bioinformatics, markov-chain
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Deque;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Random;
imp... | {
"domain": "codereview.stackexchange",
"id": 45466,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, algorithm, statistics, bioinformatics, markov-chain",
"url": null
} |
quantum-algorithms, quantum-gate, grovers-algorithm, cryptography
Then the hash function is a sub-call of the oracle. Which means that the hash function must be reversible. But if the has-function is reversible, I can directly read the plaintext, because I have the cryptotext (the hash). Do I understand something wron... | {
"domain": "quantumcomputing.stackexchange",
"id": 701,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-algorithms, quantum-gate, grovers-algorithm, cryptography",
"url"... |
ros
Originally posted by sam on ROS Answers with karma: 2570 on 2012-10-03
Post score: 0
Original comments
Comment by Mani on 2012-10-04:
Could you please update this post with the contents of manifest.xml?
Try to install libsqlite3-dev package.
sudo apt-get install libsqlite3-dev
Assuming you're on Ubuntu/Debian.
... | {
"domain": "robotics.stackexchange",
"id": 11223,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros",
"url": null
} |
c++, c++11, ai
// Auxiliary:
for (AuxComponent component : this->auxComponents.getList())
{
switch (component)
{
case COMP_AUX_MISSILES:
this->maxMissiles += 4;
break;
case COMP_AUX_COUNTERMEASURES:
this->maxCountermeasures += 2;
... | {
"domain": "codereview.stackexchange",
"id": 5643,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "c++, c++11, ai",
"url": null
} |
send it With Webforms: This is possible by using the default Rule that comes with FillPDF. Basis of Romberg Rule. Integration is the reverse process of differentiation, so the table of basic integrals follows from the table of derivatives. Multiplication by a Constant (Used in Chem 14B) Order is then unimportant - you ... | {
"domain": "netcup.net",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.96036116089903,
"lm_q1q2_score": 0.8084566558690935,
"lm_q2_score": 0.8418256472515684,
"openwebmath_perplexity": 1073.8531144250846,
"openwebmath_score": 0.9491413831710815,
"tags": ... |
magnetic-fields, solar-wind
Title: Should there be a difference in strength or otherwise between daytime and nighttime auroras? Or do they have exactly the same characteristics?
I.e. if I observe them in a place where it’s dark 24 hours.
Should there be a difference in strength or otherwise between daytime and night... | {
"domain": "physics.stackexchange",
"id": 45861,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "magnetic-fields, solar-wind",
"url": null
} |
moveit, ros-control, ur5
Originally posted by Anirudh_s on ROS Answers with karma: 47 on 2017-08-02
Post score: 0
Original comments
Comment by gvdhoorn on 2017-08-03:
Please don't post answers unless you are actually answering your own question. For everything else, use comments or update your original question. This... | {
"domain": "robotics.stackexchange",
"id": 28506,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "moveit, ros-control, ur5",
"url": null
} |
UK) Discrete Mathematics (Chapter 6) 2 / 13 ICS 241: Discrete Mathematics II (Spring 2015) 10.2 Graph Terminology and Special Types of Graphs Undirected Graph Adjacent/Neighbors and Incident Edge Two vertices u and v in an undirected graph G are called adjacent (or neighbors) in G if u and v are endpoints of an edge e ... | {
"domain": "redwoodcc.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9752018390836985,
"lm_q1q2_score": 0.8040167784445855,
"lm_q2_score": 0.8244619177503205,
"openwebmath_perplexity": 982.2762278091589,
"openwebmath_score": 0.3724142909049988,
"tag... |
beginner, rust
You assigned an initial value to company, but overwrote it
afterwards. It is recommended to postpone the declaration of
company to the place you calculate it.
warning: you don't need to add `&` to both the expression and the patterns
--> src\main.rs:64:9
|
64 | / match &&keyword[..] {
65 |... | {
"domain": "codereview.stackexchange",
"id": 39043,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "beginner, rust",
"url": null
} |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.