text stringlengths 1 1.11k | source dict |
|---|---|
quantum-gate, quantum-circuit, classical-computing
What does | {
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"tags": "quantum-gate, quantum-circuit, classical-computing",
"url": null
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parsing, bash, stackexchange, sed, yaml
Thanks a lot! I see 2 errors and have some more advice.
The Shebang is wrong.
#!/bash/bin
should be
#!/bin/bash
Do not put comment after the \ escape for a new line
| cut -d"/" -f3,5 \ # stackoverflow.com/3581081
# should be
| cut -d"/" -f3,5 \
I would move all functions (in y... | {
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"tags": "parsing, bash, stackexchange, sed, yaml",
"url": null
} |
(3) Exactly One Possibility out of many : Comparing Integers and rational numbers, we know that either (1) A<B or (2) A=B or (3) A>B. If we can Prove that two of these Possibilities are not correct or are false, then we know that the third and last remaining Possibility must be correct or must be true. Likewise, Statem... | {
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"lm_q1_score": 0.9814534365728416,
"lm_q1q2_score": 0.8135648379880788,
"lm_q2_score": 0.8289388040954683,
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"openwebmath_score": 0.6970574259757996,
"tag... |
• The article you linked to looks very theoretical and I suppose it may be useful in certain situations (though I don't pretend to even understand what it involves :) – dsp_user Nov 10 '17 at 7:09
• Now that you brought this up and since I'm doing some audio manipulations in the frequency domain (which sometimes/often ... | {
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"lm_q1_score": 0.9766692332287864,
"lm_q1q2_score": 0.8007646043124279,
"lm_q2_score": 0.8198933447152497,
"openwebmath_perplexity": 1159.9304544802937,
"openwebmath_score": 0.5943626761436462,
"ta... |
python, unit-testing, linked-list, reinventing-the-wheel, hash-map
class HashTableTest(unittest.TestCase):
def test_init(self):
ht = HashTable(4)
assert len(ht.buckets) == 4
assert ht.length() == 0
assert ht.size == 0
def test_keys(self):
ht = HashTable()
asser... | {
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"tags": "python, unit-testing, linked-list, reinventing-the-wheel, hash-map",
"url": n... |
6. Sep 8, 2010
CompuChip
Yes, that also works. But where do you get these four solutions from in the first place? Are they guesses or what?
7. Sep 8, 2010
t_n_p
I explained in the original post.
Now because of the 2 infront of the (x+[pi/6]), I consider twice the domain, i.e. [-2pi, 2pi]. I know the base angle is... | {
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"lm_q1_score": 0.9697854111860906,
"lm_q1q2_score": 0.8663184276008916,
"lm_q2_score": 0.8933094039240554,
"openwebmath_perplexity": 1615.3471035095438,
"openwebmath_score": 0.7541785836219788,
"ta... |
linear-systems, impulse-response, stability
Title: Behaviour of System by Impulse Response In a book by Alan Oppenheim, it is given that for a LTI system, its characteristics are completely determined by its impulse response. But if impulse response of a system is basically an input output relation and impulse respons... | {
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"tags": "linear-systems, impulse-response, stability",
"url": null
} |
# Similar adjacency matrices of the same graph
I am able to represent a simple graph on $n$ vertices by at most $n!$ different adjacency matrices. Do all of the adjacency matrices corresponding to the same graph have the same spectrum or are they similar?
Adjacency matrices $A$ and $B$ represent isomorphic graphs if ... | {
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"lm_q1_score": 0.9881308800022472,
"lm_q1q2_score": 0.8101619235242206,
"lm_q2_score": 0.8198933359135361,
"openwebmath_perplexity": 149.10819328882533,
"openwebmath_score": 0.7755539417266846,
"ta... |
gazebo-1.4, gazebo-plugin
and running with the usual;
rosmake gazebo_worlds
roslaunch gazebo_worlds empty_world.launch
rosrun gazebo spawn_model -file object.urdf -urdf -z 1 -model my_object
I get;
...
[ INFO] [1365999923.235584629, 0.076000000]: Starting to spin physics dynamic reconfigure node...
Warning [parse... | {
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"openwebmath_score": null,
"tags": "gazebo-1.4, gazebo-plugin",
"url": null
} |
evolution, bacteriology, horizontal-gene-transfer
I'm obviously missing something as the feature has persisted, so what is the advantage to the donor species of conjugation? The donor bacterium, viewed as a unit, may well gain no advantage from sharing its genes. The genes that are shared, however, may gain a very s... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "evolution, bacteriology, horizontal-gene-transfer",
"url": null
} |
organic-chemistry, terminology, conformers
Title: What are skew positions in the conformation of cyclohexane? I encountered a question which mentioned the skew position during discussion of the conformers of cyclohexane (chair/boat).
Here is the question (grammatical errors have been emended):
Which of the following ... | {
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"tags": "organic-chemistry, terminology, conformers",
"url": null
} |
equivalent elements enormously important, but is not a very interesting example, in given. Equivalence relation properties let R be the equivalence relation on a set and an equivalence on... Similar to ’ denotes equivalence relations ) is an equivalence class is a on! In using the equivalence relation properties a, we ... | {
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"lm_q1_score": 0.9752018383629826,
"lm_q1q2_score": 0.8768248160709537,
"lm_q2_score": 0.8991213732152424,
"openwebmath_perplexity": 465.4254196726806,
"openwebmath_score": 0.8404521942138672... |
ros, vrep
Create multiple .cpp files with the
topic names hardcoded in them, one
for every robot I want to control.
(NOT Dynamic)
Create multiple nodes inside a
single main with appropriate
callback functions defined for every
robot. (Seems messy, still NOT
Dynamic)
Thanks in advance.
Originally posted by merosss on... | {
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"openwebmath_score": null,
"tags": "ros, vrep",
"url": null
} |
python, python-3.x, file-system, serialization
################################################################################
if __name__ == '__main__':
_sys.stdout.write('Content-Type: text/plain\n\n')
_sys.stdout.write(file(_sys.argv[0]).read())
The code has since then been rewritten for Python 3 and att... | {
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"openwebmath_score": null,
"tags": "python, python-3.x, file-system, serialization",
"url": null
} |
statistical-mechanics, non-equilibrium, brownian-motion, stochastic-processes
The power spectral density tells you exactly what it sounds like: the amount of fluctuations at a given frequency.
There are a few ways to see the meaning of "amount of fluctuations at a given frequency", the most direct and possibly intuiti... | {
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"tags": "statistical-mechanics, non-equilibrium, brownian-motion, stochastic-processes",
... |
classification, machine-learning-model, probability
If you want to optimize according to a relevant constraint (maybe one of your features costs money, etc), things might get tricky — you probably would need to use a |y_true-y_est| loss function along with a large sample size in order to push the implicit transform im... | {
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"tags": "classification, machine-learning-model, probability",
"url": null
} |
f#
This is obviously fairly verbose, but that's kind of the point, because their intent is now much clearer than the nested combinations of Ok/Error/Some/None, which ultimately gave us more flexibility than we wanted or needed. This already should make some difference to the readability of the handleCore function:
let... | {
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"tags": "f#",
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numbers that are inside the together... Requires us to divide 1 by ( √3 − √2 ) multiply multi-term expressions which contain only radicals /. 1 by ( √3 − √2 ) the idea is to have denominator. Is the consequence of having an exponent of { 1 \over 2 } what you. Radical symbol on one side of the equation question requires... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9805806546550656,
"lm_q1q2_score": 0.8373303299532093,
"lm_q2_score": 0.8539127566694177,
"openwebmath_perplexity": 695.313528980847,
"openwebmath_score": 0.941363513469696,
"tags": null,... |
electromagnetism
The power of the motor is not constant and neither is the energy. The power into a motor is just the voltage measured at the lead wires times the current in the lead wires (P=V*I). The output power of the motor is just the speed of the motor times the torque. The power will be zero when there is ze... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electromagnetism",
"url": null
} |
java, object-oriented, enum
public boolean isQueueClosed() {
return !isWindow1Open() && !isWindow2Open();
}
private void validateQueueEmpty() {
if (pendingElementsInQueue() == 0)
throw new IllegalStateException("Queue is empty");
}
private void validateWindowsClosed() {
... | {
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"openwebmath_score": null,
"tags": "java, object-oriented, enum",
"url": null
} |
quantum-field-theory, supersymmetry
A symmetry of the theory implies existence (Wigner's theorem) of a linear unitary operator $U$ (it can also be anti-unitary and anti-linear) that acts on the one-particle states and acts on multi-particle states as if they were tensor product of one-particle states (points 1 and 2).... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-field-theory, supersymmetry",
"url": null
} |
c++, performance, hash-map
//=============================================================================
template <typename TItem>
uintptr_t HashTable<TItem>::computeIndex(const TItem* address) const
{
uintptr_t index = reinterpret_cast<uintptr_t>(address); /// Nonstandard
index >>= 5; ... | {
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"tags": "c++, performance, hash-map",
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} |
condensed-matter, magnetic-fields, solid-state-physics, electric-current, superconductivity
Title: How is the supercurrent created? Why and how is the supercurrent generated in a superconductor in response to an applied magnetic field? Does it flow only along the surface? If yes, why? When a magentic field is changing... | {
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"tags": "condensed-matter, magnetic-fields, solid-state-physics, electric-current, supercon... |
Hence, given any three sequences, two pairs each have a distance of $5$, and the distance between the third pair is $6$. Example: $S_1=00000000,\,S_2=00011111,\,S_3=11111000$.
Now we add a fourth sequence $S_4$. WLOG we can assume $r=s=5$ and $|S_2-S_3|=6$. Suppose $S_4$ differs from $S_1$ by $t$ digits. The two seque... | {
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"lm_q1_score": 0.9902915255242087,
"lm_q1q2_score": 0.8861024142961171,
"lm_q2_score": 0.894789454880027,
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"openwebmath_score": 0.8983186483383179,
"tag... |
1 comment
Well explained.Thanks @ Debashish Deka
suppose there are $7$ teams.
Team A B C D E F G Points 0 0 0 0 0 0 0
$A$ wins all the matches but loses to $B$
Team ${\color{Green} A}$ B C D E F G Points ${\color{Green}{10}}$ $2$ 0 0 0 0 0
now since $A$ has played with all the teams next $B$ plays with remaini... | {
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"lm_q1_score": 0.9591542864252023,
"lm_q1q2_score": 0.807440677984012,
"lm_q2_score": 0.8418256472515683,
"openwebmath_perplexity": 711.531541861469,
"openwebmath_score": 0.2821524441242218,
"tags": ... |
-
I was thinking about something like that to suggest but I guess it gets tedious for higher degree polynomials. However, it is very clever! (+1) – Pedro Tamaroff Apr 27 '12 at 18:01 | {
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"openwebmath_score": 0.8772565126419067,
"ta... |
the degree of and the degree of If the degree of is less than the degree of the line is a horizontal asymptote for If the degree of is equal to the degree of then the line is a horizontal asymptote, where and are the leading coefficients of and respectively. In this example, there is a vertical asymptote at x = 3 and a... | {
"domain": "webmediaart.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9833429638959674,
"lm_q1q2_score": 0.8434802271210174,
"lm_q2_score": 0.8577681013541611,
"openwebmath_perplexity": 472.06355430950026,
"openwebmath_score": 0.8472520709037781,
"... |
digital-communications
As you say "$A$ give $x$ to $B$, then $B$ give $x$ to $C$" which specifies that while $B$ ls listening to what $A$ is telling it (the $x$ that is being given to $B$), the transmitter in $B$'s possession must remain silent until $B$ has completely received $x$. It is only then that $B$ can start ... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "digital-communications",
"url": null
} |
c++, callback
The System Data transfer is over-simplified within this code.
An introduced "Guarders" to guard against inaccepted payloads and allowed for correction in some cases.
A partial of SystemInterface is herein provided.
Comes with a "simplified ServiceManager", which manages Services (or Entities), giving eac... | {
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"tags": "c++, callback",
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context-free, dynamic-programming, parsers, ambiguity, syntax-trees
look at it in a simpler case, the CYK algorithm. It is also often
described as a recognizer, and the parser aspect is added at the end.
You can look at the description in wikipedia. The information needed
to build the forest is what they store in the ... | {
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"tags": "context-free, dynamic-programming, parsers, ambiguity, syntax-trees",
"url": null
} |
primes, common-lisp
(when (aref arr p) ; not marked as composite: p is prime
(push p result)
(loop for i from (* p p) to n by (* 2 p) ; mark the multiples
do (setf (aref arr i) nil))))) | {
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"tags": "primes, common-lisp",
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Plot the -scores of gpa and lsat on the same axes.
Zgpa = zscore(gpa);
Zlsat = zscore(lsat);
plot([Zgpa, Zlsat])
legend('gpa z-scores','lsat z-scores','Location','Northeast')
Now, you can see the relative performance of individuals with respect to both their gpa and lsat results. For example, the third individual's g... | {
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"lm_q2_score": 0.8289388040954683,
"openwebmath_perplexity": 1109.5879184365094,
"openwebmath_score": 0.8610626459121704,
"tags":... |
organic-chemistry, acid-base, resonance
Since the principle is that a molecule with more resonance structures is more stable than a molecule with less resonance structures, squaric acid anion is more stable than acetate anion. Since a more stable conjugate base makes an acid stronger, squaric acid is considered to be ... | {
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"url": null
} |
representation. So we can determine the eigenvalues and eigenvectors of a linear transformation by forming one matrix representation, using any basis we please, and analyzing the matrix in the manner of Chapter E. | {
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"lm_q2_score": 0.8152324983301568,
"openwebmath_perplexity": 184.2012371550731,
"openwebmath_score": 0.9488658905029297,
"tags": null,
... |
x. Rules for Finding Integrating Factor. exact & non exact differential equations, integrating factor Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Integrating Factor Depends on the Variable $$x:$$ \(\mu = \mu \left( x \right). We seek an integrating fac... | {
"domain": "jf-huenstetten.de",
"id": null,
"lm_label": "1. YES\n2. YES",
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"lm_q1_score": 0.9947798736874025,
"lm_q1q2_score": 0.8415265051370604,
"lm_q2_score": 0.8459424314825853,
"openwebmath_perplexity": 444.8221804955363,
"openwebmath_score": 0.9115209579467773,
"tag... |
optics, optical-materials
EDIT: A restatement of this question would be the following - Assuming all of the optics are perfect, if I shine a laser at a point (x,y) on an objective, and then shine the laser at a point (x2,y2), will the peak of the Airy disk move the same distance? Having spent rather a lot of years des... | {
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"openwebmath_score": null,
"tags": "optics, optical-materials",
"url": null
} |
c++, algorithm, c++11, sorting, shuffle
test(tmp,expected, tstName);
}
int main()
{
test1();
test2();
test3();
test4();
test5();
return 0;
} Use std::swap rather than writing your own
int p1=0;
int p2=0;
while(p2 < nums.size())
{
if(p2 % 2 == 0)
{
... | {
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"tags": "c++, algorithm, c++11, sorting, shuffle",
"url": null
} |
such as an array containing two two-element arrays ([[76, 9], [4, 1]]) or an object with property names like "11" and "01", but the flat array is simple and makes the expressions that access the table pleasantly short. out [Optional] Alternate output array in which to place the. Sub Array with Maximum Sum – Kadane Algo... | {
"domain": "lampedusasiamonoi.it",
"id": null,
"lm_label": "1. Yes\n2. Yes",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.97594644290792,
"lm_q1q2_score": 0.8963875270376713,
"lm_q2_score": 0.9184802440252811,
"openwebmath_perplexity": 681.2426012969111,
"openwebmath_score": 0.3012574017047882,
"ta... |
machine-learning, algorithms, clustering, k-means, hierarchical-data-format
Sort datapoints based on their xi value.
Calculate distances between adjacent datapoints (N-1 distances). Each distance must be assigned a pair of original datapoints (di, dj).
Sort distances in descending order to generate list of datapoint ... | {
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"tags": "machine-learning, algorithms, clustering, k-means, hierarchical-data-format",
... |
rivers, geomorphology
The stream bifurcation ratio is so regular in any given drainage basin that it's actually remarkable to look at a graph - as in these Indian continent sub-basins.
The process Fluvial Geomorphology describes for the evolution of these basins involves the random weathering of locally-level surfaces... | {
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"id": 2369,
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"openwebmath_score": null,
"tags": "rivers, geomorphology",
"url": null
} |
algorithm, ruby, validation
test 'blank is not a valid CPF' do
assert_invalid ''
end
test 'valid CPF' do
assert_valid '01234567890'
end
test 'masked valid CPF' do
assert_valid '012.345.678-90'
end
test 'mask returns a masked CPF when CPF is valid' do
assert_equal '012.345.678-90', CPF.ma... | {
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"tags": "algorithm, ruby, validation",
"url": null
} |
newtonian-mechanics, spring, oscillators, non-linear-systems
\end{bmatrix}
\begin{bmatrix}
y_1 \\
y_2
\end{bmatrix}
=
\begin{bmatrix}
0 \\
0
\end{bmatrix}
\tag{16}
\end{equation}
that is 2 independent differential equations
\begin{align}
\ddot{y}_1+\xi_1\omega_{0}^{2} y_{1} & =0
\tag{17.1}\\
\d... | {
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"tags": "newtonian-mechanics, spring, oscillators, non-linear-systems",
"url": null
} |
mathematical-physics, waves, differential-geometry, geometry
Another example: imagine you are driving around on a plane. Because of friction (and other dissipative forces), to maintain constant velocity you need to keep the accelerator pedal depressed. Now above you there is a pigeon. Because of drag, for it to mainta... | {
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"tags": "mathematical-physics, waves, differential-geometry, geometry",
"url": null
} |
python, api, tkinter
class KillPage(tk.Frame, DataCollected):
def __init__(self, parent, controller):
tk.Frame.__init__(self, parent)
self.controller = controller
self.label = tk.Label(self, text = 'Kills Average', width=20,font=("bold", 20))
self.label.place(x=90, y=100)
... | {
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"tags": "python, api, tkinter",
"url": null
} |
The first $O(n)$ shuffle or random permutation generator was published by Richard Durstenfeld in 1964. This algorithm came to the notice of programmers because it was included in Knuth's TAOCP, Vol 2, 1969, page 125, as Algorithm P. A succinct statement of the algorithm is:
$$\text{for }\ k \leftarrow n,n-1,\ldots,2\ ... | {
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"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9643214511730025,
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"lm_q2_score": 0.8418256452674008,
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"openwebmath_score": 0.5408061742782593,
"ta... |
$\begin{split} \left[ \begin{matrix} 1 & 2 & 0 & 3 & 0 & 4 \\ 0 & 0 & 1 & 2 & 0 & 7 \\ 0 & 0 & 0 & 0 & 1 & 6 \\ 0 & 0 & 0 & 0 & 0 & 0 \end{matrix} \right] \end{split}$
$\begin{split} \left[ \begin{matrix} 1 & 2 & 0 & 0 & 4 \\ 0 & 0 & 1 & 0 & 6 \\ 0 & 0 & 0 & 1 & 5 \end{matrix} \right] \end{split}$
QUESTION: : What are... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9790357610169272,
"lm_q1q2_score": 0.8093804125396294,
"lm_q2_score": 0.8267117962054049,
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"openwebmath_score": 0.950788140296936,
"tags": null,... |
c#, finance
Console.WriteLine("La personne a t-elle choisit une consultation?");
cons = Convert.ToString(Console.ReadLine()).ToLower();
Console.WriteLine("La personne a t-elle choisit une image radio?");
imgrad = Convert.ToString(Console.ReadLine(... | {
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"id": 20267,
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"openwebmath_score": null,
"tags": "c#, finance",
"url": null
} |
back to the flat price on the day of the payment. Formula. Total interest revenue $675 For ACT/ACT, the formula to calculate the accrued interest per £100 nominal is: Accrued = actual days between previous coupon and sett. We hope you like the work that has been done, and if you have any suggestions, your feedback is h... | {
"domain": "showasis.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9748211619568682,
"lm_q1q2_score": 0.8206294614214917,
"lm_q2_score": 0.8418256532040707,
"openwebmath_perplexity": 1831.8093895159877,
"openwebmath_score": 0.3076755404472351,
"tags": ... |
}
}
(not guaranteed to compile and do the correct thing, but I think it should)
1 Like
Thanks a lot for your input! In my code I was generating a new dataset, with the same number of subjects, at each sampling iteration (and was stuck with the loop because I couldn’t find how to use multi_normal_cholesky_rng to fi... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.978051741806865,
"lm_q1q2_score": 0.8779924440574133,
"lm_q2_score": 0.897695292107347,
"openwebmath_perplexity": 3722.6402103720493,
"openwebmath_score": 0.6761679649353027,
"tags":... |
c#, asp.net-mvc
buttonBDictionary.Add("S", (sB != null && sB.Point_x != null) ? "disabled" : "enabled");
buttonBDictionary.Add("D", resultSetB.DistalId != null ? "disabled" : "enabled");
buttonBDictionary.Add("P", resultSetB.ProximalId != null ? "disabled" : "enabled");
bool aHasData = buttonADictionary.Co... | {
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"openwebmath_score": null,
"tags": "c#, asp.net-mvc",
"url": null
} |
As an example, suppose there is a finite time delay between A and A' (reasonable). Now also consider that both B and C are '1'. As you can see in the waveforms below, there is a glitch at the output.
Assuming the logic is static CMOS, the glitch is recoverable. But, if it were some forms of dynamic logic it could prop... | {
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"lm_q1q2_score": 0.8147650727135904,
"lm_q2_score": 0.8354835289107307,
"openwebmath_perplexity": 469.3537215850242,
"openwebmath_score": 0.6648054122924805,
"tag... |
The other answers give some sort of formula, like you were trying to do. But, the simplest way to see that the set of all finite subsets of $\mathbb{N}$ is countable is probably the following.
If you can list out the elements of a set, with one coming first, then the next, and so on, then that shows the set is countab... | {
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"lm_q1_score": 0.9793540716711546,
"lm_q1q2_score": 0.8560310943950199,
"lm_q2_score": 0.874077230244524,
"openwebmath_perplexity": 220.7539603480424,
"openwebmath_score": 0.951771080493927,
"tags"... |
quantum-mechanics, condensed-matter, scattering, spectroscopy, neutrons
Title: Selection rules in neutron scattering Why doesn't neutron scattering have selection rules?
According to Wikipedia, it seems that the value of the transition moment integral will be non-zero, but I guess another way of phrasing my question i... | {
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"tags": "quantum-mechanics, condensed-matter, scattering, spectroscopy, neutrons",
"url":... |
# Probability on card suits in a standard deck
Let's say we have a standard deck of $52$ cards with $13$ cards each of the standard suits of spades, clubs, diamonds, hearts. Let's say we have $p$ players and each player is dealt q cards where $pq<52$.
1. Without distinguishing cards by their letter (so we treat any t... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9911526446557306,
"lm_q1q2_score": 0.8404654805868583,
"lm_q2_score": 0.8479677526147223,
"openwebmath_perplexity": 293.98611757326546,
"openwebmath_score": 0.8394200205802917,
"ta... |
schroedinger-equation, computational-physics, many-body
Without knowing details of the specific HF problem you are investigating, it is hard to know what is causing this behavior. If you are describing the two-particle interaction by a function with a variable parameter, you are likely to see the nature of the non-li... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
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"tags": "schroedinger-equation, computational-physics, many-body",
"url": null
} |
waves, dispersion, phase-velocity
The phase velocity of a plane wave is thus the velocity of a point chosen on the envelope moving with the wave. Since $v_{\phi}=\frac{\omega}{k}$ does not depend on x(t), the phase velocity is independent of the chosen point and our definition makes sense.
Plane waves infinite extensi... | {
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"id": 90221,
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"openwebmath_score": null,
"tags": "waves, dispersion, phase-velocity",
"url": null
} |
c++, beginner, c++11
void DisplayAdditionalMenu()
{
std::cout << "What would you like to do?\nChoose a number from the Additional Menu...\n";
std::cout << "\t1. Delete an item\n";
std::cout << "\t2. Search for specific item\n";
std::cout << "\t0. Back to main menu\n";
std::cout << "\n";
}
void Add... | {
"domain": "codereview.stackexchange",
"id": 37184,
"lm_label": null,
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"tags": "c++, beginner, c++11",
"url": null
} |
is subtracted from the. Percentage Change: Divide by the Old Value; Percentage Error: Divide by the Exact Value; Percentage Difference: Divide by the Average of The Two Values; Step 3: Is the answer negative? Percentage Change: a positive value is an increase, a negative value is a decrease. 54 INR 1 USD = 3. If we use... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9848109529751892,
"lm_q1q2_score": 0.8051562990284533,
"lm_q2_score": 0.8175744761936437,
"openwebmath_perplexity": 766.3587739289256,
"openwebmath_score": 0.6256626844406128,
"ta... |
java, json, tic-tac-toe, machine-learning
for(int x = 0; x < winningPositions.size(); x++){
if (state.charAt(Integer.parseInt(winningPositions.get(x).charAt(0) + "")) != ' ' && state.charAt(Integer.parseInt(winningPositions.get(x).charAt(0) + "")) == state.charAt(Integer.parseInt(winningPositions.get(x).ch... | {
"domain": "codereview.stackexchange",
"id": 18385,
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"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, json, tic-tac-toe, machine-learning",
"url": null
} |
machine-learning, random-forest, generative-models
Other suggestion could be to just switch $X$ and $Y$ and train a discriminative model. Now $X$ will be profit margin and $Y$ will be features of a t shirt. $P(Y|X)$ will directly give me the probability distribution of t shirt features, given a target profit margin. B... | {
"domain": "datascience.stackexchange",
"id": 2402,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "machine-learning, random-forest, generative-models",
"url": null
} |
# Slope of the tangent
I have the following exercise.
$1$. Find the slope of the tangent to the curve $y = x^3 -4x + 1$ at the point where $x = a$.
$2$. Find the equations of the tangent lines in the points $(1, -2)$ and $(2,1)$.
$3$. Graph the curve and the two tangents in a single Cartesian plane.
I understand p... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9783846634557752,
"lm_q1q2_score": 0.8392271587238407,
"lm_q2_score": 0.8577681049901037,
"openwebmath_perplexity": 296.41394161369726,
"openwebmath_score": 0.8288813233375549,
"ta... |
%matplotlib inline
import random
import torch
from d2l import torch as d2l
%matplotlib inline
import random
from mxnet import gluon, np, npx
from d2l import mxnet as d2l
npx.set_np()
%matplotlib inline
import random
import tensorflow as tf
from d2l import tensorflow as d2l
## 3.3.1. Generating the Dataset¶
For th... | {
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"lm_q1_score": 0.9802808730448281,
"lm_q1q2_score": 0.8190085351819145,
"lm_q2_score": 0.8354835411997897,
"openwebmath_perplexity": 4609.576472749244,
"openwebmath_score": 0.24987474083900452,
"tags": null,
... |
ros, ros-melodic, boost
Title: pthread_recursive_mutex - assertion failed error
I'm getting the following error. I have all the latest ros codebase and I don't have any activity servers. I only have publishers, subscribers and services. I'm attaching the backtrace as well.
/usr/include/boost/thread/pthread/recursive_... | {
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"tags": "ros, ros-melodic, boost",
"url": null
} |
defined by voltage(V) and current(C) are used in geometry, scientific calculations and calculus. Phase of complex number. Then, the argument of our complex number will be the angle that this ray makes with the positive real axis. Either undefined, or any real number is an argument of 0 . An alternative option for coord... | {
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"id": null,
"lm_label": "1. Yes\n2. Yes\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9835969655605173,
"lm_q1q2_score": 0.8884774407223296,
"lm_q2_score": 0.9032942067038785,
"openwebmath_perplexity": 641.9323531297422,
"openwebmath_score": 0.8969402313232422,
"tags": ... |
java, beginner, swing, text-editor
use more spaces to increase readability (eg around =, ==, etc).
don't declare multiple fields in one line, it makes it easy to overlook a field (and it makes it easy to not realize that way too many fields were added :) ).
don't just print the stacktrace of exceptions, but handle th... | {
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, beginner, swing, text-editor",
"url": null
} |
homework-and-exercises, quantum-field-theory, symmetry, feynman-diagrams
I have drawn the diagram I am looking for, but instead of $6$ external lines, I want the diagram to have $n$ external lines. Please ignore the arrows in my diagram and assume that the external points are held fixed. Cheng and Li's appendix gives ... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "homework-and-exercises, quantum-field-theory, symmetry, feynman-diagrams",
"url"... |
tensorflow, rnn
Title: Bahdanau Attention In the original paper, the author says that the annotation are the concatenation fo the forward states and the backward states at each time step. | {
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"id": 1952,
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"openwebmath_score": null,
"tags": "tensorflow, rnn",
"url": null
} |
thermodynamics, fluid-dynamics, astrophysics, white-dwarfs
It can be found in any textbook or set of lecture notes that treat polytopes as a means of solving the stellar structure equations (e.g. these lecture notes). | {
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"tags": "thermodynamics, fluid-dynamics, astrophysics, white-dwarfs",
"url": null
} |
You can use whatever method you like to come up with model in an exploratory analysis. However it is a good idea keep track of how you do the exploratory analysis. For example, one strategy would be to decide on a list of independent variables, then look at the correlation coefficients between each independent variable... | {
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"id": null,
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"lm_q1_score": 0.9780517450056274,
"lm_q1q2_score": 0.8018981122129847,
"lm_q2_score": 0.8198933403143929,
"openwebmath_perplexity": 431.8432274751122,
"openwebmath_score": 0.5763149261474609,
"tags": n... |
Problem 3: Let be an m x n matrix with SVD . By applying the results of problem 2 to the matrices and , show that
where . For simplicity you can assume so that . Note that if is the number of nonzero singular values (or equivalently, the rank of ), then clearly one can also write the sum going to just instead of .
Pr... | {
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"lm_q2_score": 0.8418256512199034,
"openwebmath_perplexity": 639.3726432439397,
"openwebmath_score": 0.9284797310829163,
"tags"... |
cc.complexity-theory, np-hardness, complexity-classes, sat
Title: Complexity of the Complete (3,2) SAT problem? A complete $k$-CNF formula is a $k$-CNF formula which contains all clauses of size $k$ or lower it implies.
Deciding the satisfiability of a complete $k$-CNF formula is clearly a tractable problem since a $k... | {
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"tags": "cc.complexity-theory, np-hardness, complexity-classes, sat",
"url": null
} |
python, performance, python-2.x, mathematics
# checksquare checks for the possibility of a set being a magic square.
# One example of an incoming list (split for readability) is:
# [[1634],
# [15, 25, 28], [11, 27, 28], [8, 27, 29],
# [3, 28, 29], [12, 23, 31], [13, 21, 32],
# [9, 23, 32], [4, 23, 33], [3, 20, 35]]
# ... | {
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"tags": "python, performance, python-2.x, mathematics",
"url": null
} |
human-biology, endocrinology, mammals
Title: What controls the size of breasts? I am not a biology student, just a curious person. To be specific, I'm talking about female humans. I know that it might apply to other mammals.
What controls the size of breasts?
I have heard about progesterone hormone.
Is it just proges... | {
"domain": "biology.stackexchange",
"id": 11746,
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"tags": "human-biology, endocrinology, mammals",
"url": null
} |
sorting, time-limit-exceeded, binary-tree, binary-search-tree
Given zero elements, and asked to spit them back in ascending order,
the proper response is zero elements.
In contrast, your TreeNode(nums[0]) call
catastrophically raises IndexError in the empty case.
base case
Your insert function is lovely.
root ... | {
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"tags": "sorting, time-limit-exceeded, binary-tree, binary-search-tree",
"url": null
} |
python, performance, numpy, cython
if "D" in line and "+" not in line:
nprims = int(line.split()[1])
pgtodata = [x.replace('D', 'E').split() for x in basisdata[lnumber+2:lnumber+2+nprims]]
exponents = [float(x[0]) for x in pgtodata... | {
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"tags": "python, performance, numpy, cython",
"url": null
} |
For each positive integer $m$, let $C_m$ be the union of all $K_\sigma$ over all $\sigma$ that are $m$-length strings of 0’s and 1’s. Each $C_m$ is a union of finitely many compact sets and is thus compact. Furthermore, $C_1 \supset C_2 \supset C_3 \supset \cdots$. Thus $C=\bigcap \limits_{m=1}^\infty C_m$ is non-empty... | {
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"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9907319885346244,
"lm_q1q2_score": 0.8076769075174758,
"lm_q2_score": 0.8152324915965392,
"openwebmath_perplexity": 2702.333109678335,
"openwebmath_score": 1.0000100135803223,
"tag... |
This is my first post here, please tell me if I did anything wrong. I tried searching this integral on this website without any success.
• Hello, welcome to MSE. This isn't a bad post as a new contributor, but you (and us) would benefit by adding some proofs for your 'testing' - show us your working for $n=1,2$. Good ... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9748211604938802,
"lm_q1q2_score": 0.8398456788601862,
"lm_q2_score": 0.861538211208597,
"openwebmath_perplexity": 640.1805197314969,
"openwebmath_score": 0.9989050030708313,
"tags... |
homework-and-exercises, quantum-field-theory, fourier-transform, integration, commutator
Title: Commutation relations in Quantum Field Theory \begin{align}
[a, a^\dagger] =&
\left[\int d^3 x e^{-ikx} (\omega \phi(x) + i \Pi^\dagger(x)), \int d^3 x' e^{ikx'} (\omega \phi^\dagger(x') - i \Pi(x')) \right] \\
=& \int d^3x... | {
"domain": "physics.stackexchange",
"id": 28935,
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"openwebmath_score": null,
"tags": "homework-and-exercises, quantum-field-theory, fourier-transform, integration, comm... |
1. Consider the set $UB(A)$ of upper bounds of $A$: $$UB(A)=\{x\in X: a\le x,\text{ for all }a\in A\}$$
2. Take the minimum $m$ of $UB(A)$ (if it exists).
When both steps succeed, $m$ is the supremum of $A$.
Now, if $A$ is the empty set, what's the set of upper bounds? Let $x\in X$; may $x$ fail to be in $UB(\emptys... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9759464422083111,
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"openwebmath_perplexity": 116.30265403730041,
"openwebmath_score": 0.9337670207023621,
"ta... |
python, pygame
There's also some parts that I thought could maybe use constants.
if event.type == 25:
firstrectlength = random.randint(50, height / 2)
secondrectlength = height - 50 - firstrectlength
firstrect = pygame.Rect(200, 0, widthofwall, firstrectlength)
secondrect = pygame.Rect(200, height - s... | {
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"tags": "python, pygame",
"url": null
} |
quantum-field-theory, particle-physics
Also, take note that this is for the free field. The true interacting field of a QFT cannot be mode expanded in this way, and particle states are (through the LSZ formalism) only obtained in the asymptotic past and future (when they were far enough apart for interactions to be ef... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-field-theory, particle-physics",
"url": null
} |
c++, c++11, trie
private:
Node *root;
Node* find_string(std::string const &word);
};
trie.cpp
#include "trie.h"
Node::Node() {}
Node::Node(char c) : value(c) {}
char Node::get_value() const { return value < 0 ? -value : value; }
bool Node::get_leaf() const { return value < 0 ? true : false; }
// a string ... | {
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"openwebmath_score": null,
"tags": "c++, c++11, trie",
"url": null
} |
python, json, hangman
Snippet of the JSON File | {
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"openwebmath_score": null,
"tags": "python, json, hangman",
"url": null
} |
c++, performance, multithreading, matrix
Title: Multithreaded Matrix Multiplication in C++, improving efficiency? Here is a very simple Matrix Multiplication console application using multiple threads (one per row), I'm just looking for feedback to keep improving :) thank you in advance
#include <iostream>
#in... | {
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"tags": "c++, performance, multithreading, matrix",
"url": null
} |
javascript, react.js
lots of unnecessary empty lines, this is a bit unusual. In most cases empty lines are used to group statements together, here they appear to be random and make code harder to read.
you are using classes for div.bio but not for Skeleton though those styles are repeated but bio is not (or should not... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "javascript, react.js",
"url": null
} |
gazebo
[rosmake-2] Starting >>> urdf_parser [ make ]
[rosmake-2] Finished <<< urdf_parser ROS_NOBUILD in package urdf_parser
[rosmake-1] Finished <<< pluginlib ROS_NOBUILD in package pluginlib ... | {
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"tags": "gazebo",
"url": null
} |
quantum-chemistry, computational-chemistry
Title: Can Hartree-Fock mix more orbitals than there are electrons? I'm trying to understand Hartree-Fock well enough to write my own implementation. A point that I seem to be coming to that I'm not sure is correct: the method only produces one-electron orbitals that are line... | {
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"id": 10981,
"lm_label": null,
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"tags": "quantum-chemistry, computational-chemistry",
"url": null
} |
## Plot coefficient estimates and confidence intervals (if calculated) of
## objects of the class attribute tvsure
plot(model.tvOLS)
## Print of model model.tvOLS
print(model.tvOLS)
##
## Class: tvsure
##
## Mean of TV-SURE coefficient estimates for equation "demand":
## ==============================================... | {
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"id": null,
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9770226347732859,
"lm_q1q2_score": 0.818373657574057,
"lm_q2_score": 0.8376199572530448,
"openwebmath_perplexity": 3045.725653461547,
"openwebmath_score": 0.6364936232566833,
"tags": n... |
python, performance, beginner, python-3.x
summery of the code:
It opens files to read from and write to. It looks at each line of one file, separate them to columns. the fist column in both files are time stamps, first file the time stamps are random, second file contains lines with time-stamps that are increments of ... | {
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"id": 21303,
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"lm_q1q2_score": null,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, performance, beginner, python-3.x",
"url": null
} |
datetime, vba, excel
i = i + 1
Loop
End With
ccArrayLength = Application.Count(ccArray) 'store number of items
With actualsWS
.Columns("V:W").ClearContents 'clear previous data
'hide unnecessary months
If month = "January" Or month = "February" Or month = "March" Or month = "April" Then
.... | {
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"id": 20584,
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"tags": "datetime, vba, excel",
"url": null
} |
electromagnetism, photons, carrier-particles
What you consider a particle is basically just a local peak in the respective particle field, but one cannot even say "This peak corresponds to electron A, this one to B". Now QFT, more specifically Quantum Electrodynamcis (QED), describes the local interaction between the ... | {
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"id": 284,
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"lm_q1_score": null,
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electromagnetism, photons, carrier-particles",
"url": null
} |
history, terminology, hubble-constant, iau
However, several astronomers (including myself) found the voting a bit… weird; while acknowledging the work of George Lemaître is admirable, many more people than him and Edwin Hubble contributed to the understanding that the Universe is expanding. So, some were joking that w... | {
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"id": 3619,
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"openwebmath_score": null,
"tags": "history, terminology, hubble-constant, iau",
"url": null
} |
java, object-oriented, game, homework, javafx
gamePane.setOnKeyPressed(e -> {
setUpGame();
startGame();
});
}
//Bind the player controls
void enableControls(){
gamePane.setOnKeyPressed(e -> {
//Starts player movement to the left when left key is pres... | {
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"tags": "java, object-oriented, game, homework, javafx",
"url": null
} |
ros, ros-melodic, build-from-source, mobile
... the above just gives me the navigation sources and omits everything else. So, manually merge the two 'src' trees (obtained from variants navigation and base)? Or what?
Comment by jordan on 2019-11-23:
Sorry. My bad. Too many projects. The platform I'm actually using to t... | {
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"tags": "ros, ros-melodic, build-from-source, mobile",
"url": null
} |
electromagnetism
Seems like those contradict each other but it could be because one is talking about charges in a wire, and one of those charges is like electron holes which are only theoretical? idk
Also in a tokamak I was wondering if the positive nucleus and the striped of negative electrons are flying around in op... | {
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"id": 75945,
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"tags": "electromagnetism",
"url": null
} |
genomics, mitochondria
So unfortunately the most plausible answer to your question is: It is not yet available for this plant. There are only very few hits for Malvales at all, and none of them seems to have the mitochondrium assembled.
There might be chances that there is a specific project/database for Malvales or m... | {
"domain": "biology.stackexchange",
"id": 4502,
"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": "genomics, mitochondria",
"url": null
} |
electricity, electric-circuits, electrical-resistance
Title: Why do Generators generate inconsistent voltage? I'm ultimately trying to understand the function of resistors in a circuit. The way I see it, a small increase in voltage could result in a high increase in current that would "burn out" an LED if there is no ... | {
"domain": "physics.stackexchange",
"id": 49872,
"lm_label": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electricity, electric-circuits, electrical-resistance",
"url": null
} |
mechanical-engineering, electrical-engineering, structural-engineering, solid-mechanics, power-transmission
Image 2 also shows a 3-phase distribution line which feeds substations along the line. That suggests to me that this line is a DC voltage, generally the highest practical DC voltage is 3000V. (AC railroads us... | {
"domain": "engineering.stackexchange",
"id": 4721,
"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": "mechanical-engineering, electrical-engineering, structural-engineering, solid-m... |
machine-learning, neural-network, deep-learning, cloud-computing
AWS: If specifically deep learning on a large data set, then probably AWS is out - their free offer does not cover machines with enough processing power to tackle deep learning projects.
Google Cloud might do, the starting credit offer is good enough to... | {
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"id": 2864,
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"openwebmath_score": null,
"tags": "machine-learning, neural-network, deep-learning, cloud-computing",
"url": nul... |
atoms, vacuum, virtual-particles
Title: What exists in the Space between quarks Apologies to all if this has been asked before, I searched but was unable to find one similar.
This is a question that has been bugging me for a while that i haven't really been able to find a suitable answer for.
I am aware that the spa... | {
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"tags": "atoms, vacuum, virtual-particles",
"url": null
} |
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