text stringlengths 1 1.11k | source dict |
|---|---|
quantum-mechanics, general-relativity, experimental-physics, standard-model, quantum-gravity
Title: Is there an experiment showing that general relativity and the standard model contradict each other? My friends and I are asking this question about the standard model and general relativity to put the discussion on a f... | {
"domain": "physics.stackexchange",
"id": 91713,
"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-mechanics, general-relativity, experimental-physics, standard-model, quant... |
python, performance, python-3.x, time-limit-exceeded, binary-search
def uniquelify_list(sequence):
seen = set()
return [int(x) for x in sequence if not (x in seen or seen.add(x))]
def leaderboard_rank(scores, score, higher_bound=None):
result, previous_higher_bound = reverse_bisect_left(sc... | {
"domain": "codereview.stackexchange",
"id": 38188,
"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, python-3.x, time-limit-exceeded, binary-search",
"url": ... |
quantum-algorithms, mathematics, hamiltonian-simulation
Title: Wick rotation of the Schrödinger equation Studying the following paper: https://www.nature.com/articles/s41534-019-0187-2.pdf
Trying to figure out how $ E_T$ shows up from (1) and (2).
Any suggestion or guidance would be appreciated. | {
"domain": "quantumcomputing.stackexchange",
"id": 3108,
"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, mathematics, hamiltonian-simulation",
"url": null
} |
ros, navigation, sensor, costmap
Originally posted by flaminga on ROS Answers with karma: 5 on 2015-07-15
Post score: 0
Double check the origin parameters for the costmap. For a local costmap that's 10m square, you'd often set them to -5.
Originally posted by David Lu with karma: 10932 on 2015-07-15
This answer was ... | {
"domain": "robotics.stackexchange",
"id": 22188,
"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, navigation, sensor, costmap",
"url": null
} |
c++, c++17, template-meta-programming, stl, doxygen
/**
* @brief Checks whether two vectors are equal.
*
* Equivalent to `std::equal(lhs.begin(), lhs.end(), rhs.begin(),
* rhs.end())`. The behavior is undefined if this expression
* triggers undefined behavior.
*
* This function does... | {
"domain": "codereview.stackexchange",
"id": 35777,
"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++17, template-meta-programming, stl, doxygen",
"url": null
} |
Spectrum Infinite series Fourier series Fourier analysis, synthesis and transform Fourier coefficients - Low order - High order. analyzed by this technique is the square wave. Each student group must submit eight graphs, four square waves and four sawtooth waves for the following values of L representing the number of ... | {
"domain": "cenews24.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9877587218253717,
"lm_q1q2_score": 0.8165917829206087,
"lm_q2_score": 0.826711791935942,
"openwebmath_perplexity": 740.4227252301312,
"openwebmath_score": 0.8933987021446228,
"tags": nul... |
security, vb.net, ms-access
Are my SQL queries secure?
Should I make a function for the queries (as I am up to 7 queries now and I should never repeat the same code multiple times). If yes, how? (I'm not asking for a code dump, just a descriptive explanation on how I could do it would be awesome)
If there is anything ... | {
"domain": "codereview.stackexchange",
"id": 9054,
"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": "security, vb.net, ms-access",
"url": null
} |
# Examples
open allclose all
## Basic Examples(1)
Test if a numeric matrix is explicitly antisymmetric:
## Scope(5)
Real matrix:
Complex matrix:
A complex antisymmetric matrix has antisymmetric real and imaginary parts:
Dense matrix:
Sparse matrix:
Approximate MachinePrecision matrix:
Approximate arbitrary-p... | {
"domain": "wolfram.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9787126457229185,
"lm_q1q2_score": 0.8001704808461554,
"lm_q2_score": 0.817574478416099,
"openwebmath_perplexity": 6070.302721641292,
"openwebmath_score": 0.8785576224327087,
"tags": nul... |
electromagnetism, photons, scattering, hydrogen
Title: Photon propagation direction prediction possible after interacting with neutral hydrogen? My current line of research deals a lot with hydrogen's Lyman-alpha emission and subsequent interactions of the Lyman-alpha photons with the surrounding hydrogen gas. My que... | {
"domain": "physics.stackexchange",
"id": 19499,
"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, photons, scattering, hydrogen",
"url": null
} |
# What is the easiest/most efficient way to find the taylor series expansion of $e^{1-cos(x)}$ up to and including degrees of four?
So I have $$e^{1-cos(x)}$$ and want to find the taylor series expansions up to and including the fourth degree in the form of $$c_{0} \frac{x^0}{0!} + c_{1} \frac{x^1}{1!} + c_{2} \frac{x... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9664104953173167,
"lm_q1q2_score": 0.8135491445662494,
"lm_q2_score": 0.8418256512199033,
"openwebmath_perplexity": 191.42927985900926,
"openwebmath_score": 0.8781670331954956,
"ta... |
java, http, client
return readResponse(request, HttpClientPool.getClient().execute(request), r);
I find it hard to see that this it's actually where you're making the request. It could be in it's own line, to better extract it's important role. I find it easier to debug too.
final HttpRequestBase request;
//postRequ... | {
"domain": "codereview.stackexchange",
"id": 20468,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, http, client",
"url": null
} |
or both diverge if lim(N → ∞) (a n ⁄ b n where a n,b n >0 and L is positive and finite. Infinite Series: P-series The p-series infinite series is defined by:. Advanced calculus is not a single theory. While emphasizing the role of approximations in calculus, most major topics are addressed, such as derivatives, integra... | {
"domain": "steuerberater-mdb.de",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9886682458008671,
"lm_q1q2_score": 0.8012947676824607,
"lm_q2_score": 0.8104789155369047,
"openwebmath_perplexity": 774.3311280764253,
"openwebmath_score": 0.8028852939605713,... |
quantum-mechanics, electromagnetism, differential-geometry, gauge-theory, topological-phase
$$\psi_n(\theta) \propto e^{i (n - \phi/2\pi) \theta}, \quad E_n \propto (n - \phi/ 2 \pi)^2$$
which gives a measurable change in the spectrum. This is a case where you do want the time-independent Schrodinger equation, not pat... | {
"domain": "physics.stackexchange",
"id": 50725,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-mechanics, electromagnetism, differential-geometry, gauge-theory, topologi... |
particle-physics, mass, electrons, standard-model, protons
$$e = 1.60217662 \times 10^{-19} \, \mathrm{C}$$
J.J. Thomson's Experiments
In 1897 J. J. Thomson proved that cathode rays (a beam of electrons) were composed of negatively charged particles with a massive charge-to-mass ratio (as compared to ionized elements)... | {
"domain": "physics.stackexchange",
"id": 51164,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "particle-physics, mass, electrons, standard-model, protons",
"url": null
} |
astrophysics, neutron-stars
Title: How does a neutron star convert its kinetic into electromagnetic radiation? Converting angular momentum into gamma rays seems amazing to me! How does it do it? Presume something to do with magnetic fields....why does it even have a magnetic field? Its made of neutrons so theres no ch... | {
"domain": "physics.stackexchange",
"id": 35023,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "astrophysics, neutron-stars",
"url": null
} |
general-relativity, gravitational-lensing, newtonian-gravity
Title: Gravitational lensing in Newtonian physics Famously, when Eddington attempted to measure gravitational lensing during the Eclipse, it was the measured magnitude of the lensing that gave gravity [pun, obviously, intended] to General Relativity - not th... | {
"domain": "astronomy.stackexchange",
"id": 5874,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "general-relativity, gravitational-lensing, newtonian-gravity",
"url": null
} |
newtonian-mechanics, forces, free-body-diagram, string, singularities
$$T \cdot \ 2\sin\theta = mg$$
$$$$
Finally, the tension force in the wire of an object of mass $m$ lying at equilibrium.
$$\boxed{T = \frac{mg}{2\sin\theta}}$$
I have two follow up questions to this,
Firstly, we can see that for $\theta = 0$ and $\... | {
"domain": "physics.stackexchange",
"id": 87336,
"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, forces, free-body-diagram, string, singularities",
"url": n... |
units, many-body
Title: Convert units of a $N$-Body simulation where $G$=$M$=$L$=1 I think that it can not be so hard, but I don't get it. I have a $N$-Body simulation where total mass $M$ and the gravitational constant $G$ and the length $L$ are equal to one: $M$ = $G$ =$L$ = 1. I just don't see how I can convert the... | {
"domain": "physics.stackexchange",
"id": 38051,
"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": "units, many-body",
"url": null
} |
homework-and-exercises, electromagnetism, forces, magnetic-fields
We also use the equation for moving charge in a magnetic field generating force: $\textbf F=\int Id\textbf r\times \textbf B$.
Since the bottom of the triangle is parallel to the wire this is the easiest piece to find the force. Using the right-hand ru... | {
"domain": "physics.stackexchange",
"id": 44265,
"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": "homework-and-exercises, electromagnetism, forces, magnetic-fields",
"url": null
... |
python
can probably be
func_args = inspect.signature(func).parameters.keys()
assuming that parameters has the interface of a regular dictionary. Also, since you're only using it to test membership, wrap it in a call to set().
Set intersection
If you do the above and make func_args a set, then this:
for k in dict(kwar... | {
"domain": "codereview.stackexchange",
"id": 39555,
"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",
"url": null
} |
ros, cpu, camera1394, gumstix, nodelet
<!-- nodelet manager process -->
<node pkg="nodelet" type="nodelet" name="camera_nodelet_manager"
args="manager" />
<!-- camera driver nodelet -->
<node pkg="nodelet" type="nodelet" name="camera1394_nodelet"
args="load camera1394/driver camera_nodelet_manag... | {
"domain": "robotics.stackexchange",
"id": 7104,
"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, cpu, camera1394, gumstix, nodelet",
"url": null
} |
Therefore, two distinct trigonometric series cannot converge to the same sum. This is what is meant by uniqueness.
My aim was to prove this for spherical harmonics and (as had been done for trigonometric series) to whittle away at the hypothesis. Instead of assuming convergence at every point of the sphere, what sort ... | {
"domain": "nalinkpithwa.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9907319871663826,
"lm_q1q2_score": 0.8234400117118366,
"lm_q2_score": 0.8311430562234878,
"openwebmath_perplexity": 1750.6731418277689,
"openwebmath_score": 0.9971259832382202,
"tag... |
particle-physics, weak-interaction, quarks
The fundamental fields $W^i_\mu$ and $B_\mu$ carry vanishing hypercharge $Y=0$ because $U(1)_Y$ is an Abelian group so its messengers are neutral. However, their helicity components, especially the longitudinal ones, if they're moving quickly, are mixing with components of th... | {
"domain": "physics.stackexchange",
"id": 517,
"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": "particle-physics, weak-interaction, quarks",
"url": null
} |
python, error-handling, logging, flask, amazon-web-services
ContentDisposition=disposition
)
self.logger.debug('Initialization of {} success with info: {}'.format(path, mpu))
part = 0
part_info = {
'Parts': [
... | {
"domain": "codereview.stackexchange",
"id": 21590,
"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, error-handling, logging, flask, amazon-web-services",
"url": null
} |
automata, linear-temporal-logic
Title: Non-deterministic Büchi vs Rabin: Automaton size for LTL->automaton Is there any general result to show that which automaton is more succinct? I have a set of LTL properties and I would like to know (show) which automaton is more efficient in term of state number and edge number.... | {
"domain": "cs.stackexchange",
"id": 17424,
"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": "automata, linear-temporal-logic",
"url": null
} |
vba, excel
TextBoxNewInput.Value = Null
TextBoxInputQuality.Value = Null
TextBoxMilestone.Value = Null
TextBoxTDSNumber.Value = Null
TextBoxacceptancecriteria.Value = Null
TextBoxcheckedcomplete.Value = Null
SubTaskID.Value = SubTaskID.Value + 0.01 | {
"domain": "codereview.stackexchange",
"id": 37053,
"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": "vba, excel",
"url": null
} |
To show the existence of W enlarge the basis $${\bf e}_1 = {\bf u}, {\bf e}_2 = T{\bf u} , \ldots , {\bf e}_k = T^{k-1} {\bf u}$$ of U to a basis $${\bf e}_1 , {\bf e}_2 , \ldots , {\bf e}_k , \ldots , {\bf e}_n$$ of V and let $${\bf e}_1^{\ast} , {\bf e}_2^{\ast} , \ldots , {\bf e}_k^{\ast} , \ldots , {\bf e}_n^{\ast}... | {
"domain": "brown.edu",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9935117298270106,
"lm_q1q2_score": 0.8028242643376763,
"lm_q2_score": 0.8080672227971212,
"openwebmath_perplexity": 247.24593537918673,
"openwebmath_score": 0.856502890586853,
"tags": null... |
satisfiability, propositional-logic, sat-solvers, 2-sat
(l1 ∨ l2 ∨ l3 ∨ l4) is arbitrary clause from arbitrary 4CNF formula, then the meaning of turning out the middle disjunction into conjunction is to turn that arbitrary clause to (l1 ∨ l2) ∧ (l3 ∨ l4).
If you do that, then you get 2CNF formula and the problem becom... | {
"domain": "cs.stackexchange",
"id": 9374,
"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": "satisfiability, propositional-logic, sat-solvers, 2-sat",
"url": null
} |
python, error-handling, email, assertions
smtp_conn = create_connection(args.server, args.port)
print smtp_conn.recv(1024)
Note that it is already standard practice of Python to print any error and exit afterwards.
Additionally, you probably want to close your SMTP connection even in the case of an exception. For thi... | {
"domain": "codereview.stackexchange",
"id": 23230,
"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, error-handling, email, assertions",
"url": null
} |
algorithm-analysis, hashing
Title: Is there a way to theoretically compare hash functions? Say I am given two hash functions f1 and f2 is there anyway that I can prove one hash function will produce fewer collisions than another one? That is say for some domain assuming all values in the domain are equally likely to b... | {
"domain": "cs.stackexchange",
"id": 12636,
"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": "algorithm-analysis, hashing",
"url": null
} |
quantum-mechanics, electrons, double-slit-experiment, wave-particle-duality
In water waves and sound waves and even electromagnetic waves what is "waving", i.e. has a sinusoidal variation with time and space, is the energy of the wave, represented by its amplitude.
When dimensions become very small, compatible with h... | {
"domain": "physics.stackexchange",
"id": 89516,
"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-mechanics, electrons, double-slit-experiment, wave-particle-duality",
"u... |
rviz, ros-groovy, osx, ogre
[ 12%] Building CXX object src/rviz/CMakeFiles/rviz.dir/properties/property_tree_model.cpp.o
[ 12%] Building CXX object src/rviz/CMakeFiles/rviz.dir/properties/property_tree_widget.cpp.o
[ 12%] Building CXX object src/rviz/CMakeFiles/rviz.dir/properties/property_tree_with_help.cpp.o
[ 13%] ... | {
"domain": "robotics.stackexchange",
"id": 12433,
"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": "rviz, ros-groovy, osx, ogre",
"url": null
} |
c++
Better random number generation
rand() and srand() are the old C way of generating random numbers, and they are quite bad. Since C++11 there are much better ways of generating random numbers in C++. In particular, consider using a properly seeded std::mt19937 as the pseudo-random number generator, and use std::uni... | {
"domain": "codereview.stackexchange",
"id": 41834,
"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
} |
observational-astronomy, exoplanet, identify-this-object, observatory
1"Benjamin Pope, an astrophysicist studying exoplanets at the University of Queensland in Australia."
Prior to 2018 definitely rules out the TESS survey, as does the concentration of observations within the Andromeda galaxy, only a few degrees long.... | {
"domain": "astronomy.stackexchange",
"id": 5953,
"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": "observational-astronomy, exoplanet, identify-this-object, observatory",
"url": ... |
solutions are called eigenfunctions. Question: Eigenvalues And Eigenvectors An Eigenvector Of An N X N Matrix A Is A Nonzero Column Vector X EC Such That Ax = Lx, For Some Number EC, Called The Eigenvalue Corresponding To X. First, you cannot assign something to a variable like A in the middle of a line of code. 1-43) ... | {
"domain": "umood.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.97112909472487,
"lm_q1q2_score": 0.800658955819999,
"lm_q2_score": 0.8244619177503205,
"openwebmath_perplexity": 1050.789163476664,
"openwebmath_score": 0.7538413405418396,
"tags": null,
... |
regex, bash, http, linux, shell
echo $state
#verify the condiitons
if [[ $state -eq "INIT" || $state -eq "0" ]]; then exit 0; fi
#wait another 10 seconds
sleep 10
done
Is there any better way of doing this if I am doing anything wrong? Instead of grepping for state, I would use bash regex support:
... | {
"domain": "codereview.stackexchange",
"id": 31213,
"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": "regex, bash, http, linux, shell",
"url": null
} |
of x. Characterization of positive definite matrix with principal minors, A is a positive definite matrix iff its leading principal minors are positive. ; ˆ 5 ¡5 ¡5 1! Definite, Semi-Definite and Indefinite Matrices, Unless otherwise stated, the content of this page is licensed under. Should a gas Aga be left on when n... | {
"domain": "jefftate.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9658995742876885,
"lm_q1q2_score": 0.8028007080186048,
"lm_q2_score": 0.8311430394931456,
"openwebmath_perplexity": 563.3175635129414,
"openwebmath_score": 0.6975210905075073,
"tags... |
• I'm a little confused as to how you came up with the recurrences. What do you mean when you say that you can add any character to an $A(k)$ word, but only $n-1$ characters to a $B(k)$ word? – Crosby Dec 28 '20 at 4:14
• Because a $B(k)$ word ends in $A$ or $B$ there is one character you can't add without the word bec... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9728307688581724,
"lm_q1q2_score": 0.8229588241397409,
"lm_q2_score": 0.8459424295406088,
"openwebmath_perplexity": 151.19244953212979,
"openwebmath_score": 0.612464964389801,
"tag... |
ros
Hello,
could you please add my account: tho..m..@gmail.com to ros-dry-releases?
I would like to remove vision_visp from the repository and release the
new one through Catkin and Bloom.
It could be that the rosbuild package has been removed, but the catkin package hasn't been released yet.
Originally posted by gv... | {
"domain": "robotics.stackexchange",
"id": 17288,
"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
} |
nor edges. Most one edge connecting a pair of vertices, the following graphs − graph I has vertices... Obtain and work with the R Programming Language.Each example builds on the Capitol on Jan 6 its accuracy utilizing! Group and Event forming a Cycle ‘ ab-bc-ca ’ given in Euler ’ s shown above, the edges be... A distin... | {
"domain": "graysurgical.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9579122720843811,
"lm_q1q2_score": 0.8023664441612738,
"lm_q2_score": 0.8376199653600371,
"openwebmath_perplexity": 2097.4943263884093,
"openwebmath_score": 0.25160670280456543,
... |
ros, python, nodes
Originally posted by anuppari on ROS Answers with karma: 63 on 2013-06-07
Post score: 4
If you aren't going to use ROS parameters, this basically a generic Python question. You should use the 'sys' module:
#!/usr/bin/env python
from __future__ import print_function
import roslib; roslib.load_manife... | {
"domain": "robotics.stackexchange",
"id": 14468,
"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, python, nodes",
"url": null
} |
Since
$$\frac{d}{dy}\left[e^{x^2-y^2}\sin(2xy)\right]=- 2ye^{x^2-y^2}\sin(2xy)+2xe^{x^2-y^2}\cos(2xy)$$
then
$$\int 2xe^{x^2-y^2}\cos(2xy)- 2ye^{x^2-y^2}\sin(2xy)\,dy= e^{x^2-y^2}\sin(2xy)+c$$
Note: Because of the fact that the integrand appeared to be the result of application of the product rule for derivatives, ... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9796676508127574,
"lm_q1q2_score": 0.8163811405433783,
"lm_q2_score": 0.8333245870332531,
"openwebmath_perplexity": 251.07067990122962,
"openwebmath_score": 0.9989522099494934,
"ta... |
# Math Help - Help with a proof.
1. ## Help with a proof.
Hi, I'm stuck at proving the following question...
Prove that for all n>0,
1/2 + 2/2^2 + 3/2^3 + ... + n/2^n = 2 - (n+2)/2^n
I've tried all sorts of different ways of solving this, but to no avail.
Any help is appreciated
2. Originally Posted by seven.j
H... | {
"domain": "mathhelpforum.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9910145693897763,
"lm_q1q2_score": 0.8574496698987214,
"lm_q2_score": 0.8652240808393984,
"openwebmath_perplexity": 458.24289227992386,
"openwebmath_score": 0.9093194603919983,
... |
c++, iterator
~input_iterator() noexcept = default;
These are kinda pointless. If you don’t need to declare the destructor, don’t bother. And in the case of the copy constructor, defining it like this means the type is no longer trivially copyable (or movable). (The explicit keyword is also meaningless here, because ... | {
"domain": "codereview.stackexchange",
"id": 40321,
"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++, iterator",
"url": null
} |
optimization, circuits, software-testing
SET stack to an empty list
SET bit_width to n
CALL gen with value as 0
some properties:
I would guess that there are solutions for all every possible n (positive integers). If there is a solution for n, there must be at least n! solutions as swapping the order of the inputs d... | {
"domain": "cs.stackexchange",
"id": 7195,
"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": "optimization, circuits, software-testing",
"url": null
} |
c#, beginner
case "Chris": return NewCoffee(true, 25, false, 0);
case "Christian": return NewCoffee(true, 25, true, 2);
default: return "";
}
}
private class Coffee
{
public bool Milk { get; set; }
public int MilkAmount { get;... | {
"domain": "codereview.stackexchange",
"id": 22730,
"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#, beginner",
"url": null
} |
c++, c++11, delegates
/** template constructor for static member functions and free functions.
allocates a new delegate on the heap **/
template<typename ReturnType>
Connection(Signal<args...>& signal, ReturnType (*Fn)(args...))
: delegate_(new FnDelegate<ReturnType, args...>(Fn)),
signal_(nullptr)... | {
"domain": "codereview.stackexchange",
"id": 7444,
"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, delegates",
"url": null
} |
complexity-theory, np, nondeterminism, lower-bounds
(The situation might be slightly different with Turing machines, as they're a bit slower/less powerful than RAM machine algorithms -- but you asked about the latter, so I assume we can ignore this.)
You might enjoy perusing the lower-bounds tag on CSTheory.SE. | {
"domain": "cs.stackexchange",
"id": 6869,
"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, np, nondeterminism, lower-bounds",
"url": null
} |
ruby
Array#join
As a last improvement, let's look at what the block is doing: it is "joining" the three variants together. And again, there is already a method which does that: Array#join:
titles = sizes.product(colors, materials).map do |variant|
variant.join(' - ')
end
Final result
So, in the end, the entire thin... | {
"domain": "codereview.stackexchange",
"id": 39745,
"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",
"url": null
} |
organic-chemistry, acid-base, carbonyl-compounds
Now that we have a lot of information on the enolate itself, it's time to look towards a mechanism of a solvent-mediated keto-enol tautomerism. I have chosen the most simplest model possible, with one water (hydronium) explicitly included. The result is a six-membered c... | {
"domain": "chemistry.stackexchange",
"id": 5408,
"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": "organic-chemistry, acid-base, carbonyl-compounds",
"url": null
} |
Note that assuming that the integers are non-negative is important. Otherwise, $-3$ divides $3$ and vice versa, but $-3 \neq 3$.
Use the contrapositive way of thinking about antisymmetry: $$aRb \text{ and }bRa \implies a = b$$ is equivalent to $$a \neq b \implies \text{not} (aRb \text{ and } bRa);$$ in other words, yo... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9814534382002797,
"lm_q1q2_score": 0.84737866757193,
"lm_q2_score": 0.8633916134888614,
"openwebmath_perplexity": 142.8630886589961,
"openwebmath_score": 0.9019265174865723,
"tags"... |
c++, multithreading, primes
The mutex m and the commented-out lock_guard should just be removed: these aren't necessary, because only one thread accesses each vector between the worker threads starting and finishing (which points are memory barriers).
Instead of result.insert(), the general case might benefit from std... | {
"domain": "codereview.stackexchange",
"id": 31803,
"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++, multithreading, primes",
"url": null
} |
file-system, shell, embedded, sh
cp /disk/usbsda1/New_Main.png /opt/pclient/projekte/Main/Main_Page2.png
cp /disk/usbsda1/New_Main.png /opt/pclient/projekte/Main/Main_Page3.png
cp /disk/usbsda1/New_Main.png /opt/pclient/projekte/Main/Main_Page4.png
cp /disk/usbsda1/New_Main.png /opt/pclient/projekte/Main/Main... | {
"domain": "codereview.stackexchange",
"id": 7769,
"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": "file-system, shell, embedded, sh",
"url": null
} |
php, security, pdo, mysqli
Almost at the end of the code, you have this echo:
echo "<script language=JavaScript>location.href='#ajax/account_setup.php';</script> ";
The language attribute is deprecated and can be safely dropped. (Source: https://developer.mozilla.org/en-US/docs/Web/HTML/Element/script#attr-language )... | {
"domain": "codereview.stackexchange",
"id": 10427,
"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, security, pdo, mysqli",
"url": null
} |
solutions, stoichiometry, precipitation
Why is the reaction leaving 0.011 moles of strontium? What was the calculation that obtained this number?
Thank you! Sr(NO3)2 + Na2SO4 = SrSO4 + 2NaNO3
So, here we have, 1 mol Sr(NO3)2 reacts with 1 mol of Na2SO4 by unitary method, you can say, 0.003 mol Sr(NO3)2 reacts with 0.0... | {
"domain": "chemistry.stackexchange",
"id": 7922,
"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": "solutions, stoichiometry, precipitation",
"url": null
} |
beginner, rust
let pairs = rng.int_range(0, 3) + 2;
self.size = 0;
fn add_char(out: &mut ResourceName, rng: &mut UnityRNG, letters: &[u8]) {
out.chars[usize::from(out.size)] = letters[rng.int_range(0, letters.len() as i32) as usize];
out.size += 1;
}
for _ in 0..... | {
"domain": "codereview.stackexchange",
"id": 44322,
"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
} |
newtonian-mechanics, classical-mechanics, angular-momentum, rotational-dynamics
Title: Is Angular Momentum Defined Only For Spinning Objects? I was just going through some of the lectures of angular momentum where it was defined as
Conservation of angular momentum, one of the fundamental laws of physics, observes that... | {
"domain": "physics.stackexchange",
"id": 46769,
"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, classical-mechanics, angular-momentum, rotational-dynamics",
... |
Repeat steps 2 - 3 until the answer is close enough. For example, 4900 + 420 + 3*3 = 5329, so the square root of 5329 is 73.
• I can do it in my head.
• It only requires keeping track of a few numbers.
• It quickly produces an estimated answer.
• It is a special case of Newton's method.
• Each time through the loo... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9796676442828174,
"lm_q1q2_score": 0.8612716349497939,
"lm_q2_score": 0.8791467595934565,
"openwebmath_perplexity": 574.0549732334247,
"openwebmath_score": 0.7430981397628784,
"tag... |
newtonian-mechanics, friction
Title: Friction causing acceleration? I'm trying to understand the two box problem, where a small box is stacked on top of a larger box. The larger box then experiences a push, causing both boxes to accelerate in the direction opposite to the applied force.
Now my understanding of the FBD... | {
"domain": "physics.stackexchange",
"id": 73727,
"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, friction",
"url": null
} |
newtonian-mechanics, forces, continuum-mechanics
So, yes pulling on a piece of an anchored paper creates tension because it transmits a force to that anchor with the aid of the paper fibers.
As to your other question about the shear stress, it is related because it also involves transmission of a force but in the perp... | {
"domain": "physics.stackexchange",
"id": 59677,
"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, forces, continuum-mechanics",
"url": null
} |
astrophysics, classical-mechanics
http://en.wikipedia.org/wiki/Elongation_%28astronomy%29
which is the angle between the object and the Sun, as seen from the Earth. The distance from the Earth is not directly listed because it's not directly measured. One only knows the angle and the redshift. $V$ is not the velocity... | {
"domain": "physics.stackexchange",
"id": 45565,
"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": "astrophysics, classical-mechanics",
"url": null
} |
python, python-2.x, linux, installer
Instead I would recommend that you make a purge function. And do the 'create' stuff in the __init__, or another single function.
Your comments are mostly pointless. # If it does not exist, and try: # try... are just bad.
If you asked any programmer, and quite a few non-programmers,... | {
"domain": "codereview.stackexchange",
"id": 16856,
"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, linux, installer",
"url": null
} |
### Motivation
The “Nonlinear Equations with Analytic Jacobian” example in Optimization Toolbox solves the same problem by using the fsolve function. The workflow shown in that example has two potential sources of errors. You would need to
1. Translate the equations for the Rosenbrock function and Jacobian from the m... | {
"domain": "mathworks.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9787126506901791,
"lm_q1q2_score": 0.8218582632632407,
"lm_q2_score": 0.8397339736884711,
"openwebmath_perplexity": 1942.734572238953,
"openwebmath_score": 0.6130073070526123,
"tags": ... |
navigation
Title: How to abstract go to goal angle? I'm currently developing a pygame based go to goal behavior. I approached the goal by Euclidean distance and vectorized mathematics. Here is the code
def move(roborect,i):
no_plants=len(test_x)
if(no_plants>i):
dx = 8*test_x[i]-roborect.x
dy = test_y[i]-robo... | {
"domain": "robotics.stackexchange",
"id": 2374,
"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": "navigation",
"url": null
} |
automata, regular-languages
I must be misunderstanding something, but what?
I think maybe what I'm doing is saying that the language itself is closed under concatenation, when that's not true. Maybe the claim is actually that the concatenation of one regular language with another regular language is a third regular l... | {
"domain": "cs.stackexchange",
"id": 16583,
"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": "automata, regular-languages",
"url": null
} |
human-biology, genetics, sex-chromosome
My question: Is it possible to make a Turner syndrome patient develop male characteristics by artificial stimulation? Has it ever been tried? After a lot of research, I've finally found an answer.
In the case of humans, it is practically impossible. See this article from wikiped... | {
"domain": "biology.stackexchange",
"id": 5543,
"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": "human-biology, genetics, sex-chromosome",
"url": null
} |
general-relativity, black-holes, coordinate-systems
$g_{\rm r\phi}=\rm \frac{3 \ a \sin^2 \theta }{a^2 \ \Lambda +3}$
$g_{\rm r\theta}=0 $
$g_{\rm u\theta}=0 $
$g_{\rm \theta\phi}=0 $
and the electromagnetic vectorpotential
$\rm A_{\mu}=\left\{\frac{3 \ r \ Q }{\left(a^2 \ \Lambda +3\right) \left(a^2 \cos^2 \theta +r^... | {
"domain": "physics.stackexchange",
"id": 96121,
"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, coordinate-systems",
"url": null
} |
c#, performance, strings
public string[] stringarraysplitter(string[] arr, string delimiter) {
string[][] tempr = new string[arr.Length][];
for (int i = 0; i < arr.Length; i++) {
tempr[i] = arr[i].Split(new string[] {
delimiter
}, System.Strin... | {
"domain": "codereview.stackexchange",
"id": 17492,
"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#, performance, strings",
"url": null
} |
object-oriented, json, react.js, jsx, authorization
const createPerms = () => {
setPermission({ ...permission, create: !permission.create });
};
const viewPerms = () => {
setPermission({ ...permission, view: !permission.view });
};
const editPerms = () => {
setPermission({ ...permission, edit: !p... | {
"domain": "codereview.stackexchange",
"id": 42347,
"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": "object-oriented, json, react.js, jsx, authorization",
"url": null
} |
molecular-biology, cell-biology, dna
The information in the DNA of in any given organisms (except for a virus) IS complete. This means that the DNA has 'code' for all the molecules required to build and sustain this organism.
However, the DNA of an organism alone (or placed inside an unnatural environment like a compl... | {
"domain": "biology.stackexchange",
"id": 7342,
"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": "molecular-biology, cell-biology, dna",
"url": null
} |
electromagnetism, magnetic-fields, maxwell-equations
Title: Finding the magnetic field by using Maxwell's laws (differential form) According to my physics book, one can use the following laws to identity the magnetic field:
div B = 0
rot B = μ0J
My book also states that, given a specific current density vector, many m... | {
"domain": "physics.stackexchange",
"id": 70182,
"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, maxwell-equations",
"url": null
} |
ros, rosseral-arduino, rosserial, rosserial-python
Title: Rosserial examples for arduino
Hello
I had problems with the rosserial communication from, the Host (PC,Ubuntu Xenial, ROS Kinetic) to the Device (Arduino Leonardo). The code (HW Input/Output) in the Arduino worked but it did not published or subscribed any to... | {
"domain": "robotics.stackexchange",
"id": 28129,
"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, rosseral-arduino, rosserial, rosserial-python",
"url": null
} |
quantum-mechanics, homework-and-exercises, quantum-field-theory, path-integral
Title: Writing down many particle Hamiltonian
We are given that
\begin{align}\mathrm{tr} e^{-\frac{i}{\hbar}\hat{H}t}&=
\int D[a_1,\dots,a_n]\times\\&\qquad\exp\left[\int_0^t dt' \left(\frac{1}{2}\sum_j (a_j(t')-a_j^*(t'))(\dot{a}_j(t')-\... | {
"domain": "physics.stackexchange",
"id": 20454,
"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-mechanics, homework-and-exercises, quantum-field-theory, path-integral",
... |
matlab, digital-communications, snr, bpsk, baseband
y = awgn(x,snr) adds white Gaussian noise to the vector signal x. The
scalar snr specifies the signal-to-noise ratio per sample, in dB. If x
is complex, awgn adds complex noise.
In your case, no oversampling thus awgn() uses its snr parameter to generate $E_s/N_... | {
"domain": "dsp.stackexchange",
"id": 5565,
"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, digital-communications, snr, bpsk, baseband",
"url": null
} |
python, algorithm, python-3.x, graph, pathfinding
if tmp >= best_path_length['value']:
return bi_traceback_path(touch_node['value'], parentsa, parentsb)
if len(opena) + len(closeda) < len(openb) + len(closedb):
expand_forward_frontier()
else:
expand_backward_frontie... | {
"domain": "codereview.stackexchange",
"id": 19288,
"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, algorithm, python-3.x, graph, pathfinding",
"url": null
} |
computability, halting-problem
Title: Why Halting problem is Recursively Enumerable? If we take this definition as R.E. set definition (Computability, Complexity and Languages book written by Davis in page 79)
$Definition.$The set $B\subseteq N$ is called r.e. if there is partially computable function $g(x)$ such tha... | {
"domain": "cs.stackexchange",
"id": 4079,
"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": "computability, halting-problem",
"url": null
} |
c#, programming-challenge
here is my solution is there a way to reduce memory foot print?
public class Solution {
public int Fib(int n) {
if (n == 0)
{
return 0;
}
if (n == 1)
{
return 1;
}
int a = 0;
int b = 1;
int c =... | {
"domain": "codereview.stackexchange",
"id": 43194,
"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#, programming-challenge",
"url": null
} |
python, unit-testing, exception-handling, file, windows
with tempfile.NamedTemporaryFile() as temp:
content = 'Some data'
temp.write(content.encode('utf-8'))
temp.flush()
self.assertEqual(content, b.read(Path(temp.name)))
When you open a file for reading, you can omit the r in here:
w... | {
"domain": "codereview.stackexchange",
"id": 9572,
"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, unit-testing, exception-handling, file, windows",
"url": null
} |
java, serialization
public static boolean serialize(Object anObject) {
seleccionador.setTitle("Dónde guardar el estado del programa");
try {
archivo = seleccionador.showSaveDialog(null);
if (archivo == null) return false;
flujoSalida = n... | {
"domain": "codereview.stackexchange",
"id": 4923,
"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, serialization",
"url": null
} |
## 1. JavaScript
### 1.1 (x, mu, sigma)
The JavaScript version of equation 1 centre $\frac{1}{\sigma \sqrt{2 \pi}}e^{-\frac{(x-\mu)^2}{2 \sigma^2}}$
JavaScript Code 1.1.1: Function xlfNormalPDF1a returns the height of the normal distribution with mean mu, and standard deviation sigma
/* =============================... | {
"domain": "excelatfinance.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9854964211605606,
"lm_q1q2_score": 0.8233660377724741,
"lm_q2_score": 0.8354835391516133,
"openwebmath_perplexity": 11766.333870044225,
"openwebmath_score": 0.25466036796569824,
"... |
java, recursion, search, set
static String hasName(String query) {
int fromIndex = 0;
int asteriskCount = 0;
while ((fromIndex = query.indexOf("*", fromIndex)) != -1) {
asteriskCount++;
fromIndex++;
}
if (asteriskCount == 0) {
return NAMES.con... | {
"domain": "codereview.stackexchange",
"id": 12387,
"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, search, set",
"url": null
} |
classical-mechanics, forces, pressure
Title: What causes the balloon to pop when we push with needle onto it's surface? I am a bit puzzled because I can see two possible reasons, first one is more common and the other one makes sense too, so here they go:
1) balloon pops because of the fact that after pressure is appl... | {
"domain": "physics.stackexchange",
"id": 27574,
"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, forces, pressure",
"url": null
} |
electricity
The amount of charge flowing is small (because your body's capacitance is small and the voltage is not that high) - but the effect is real. And it usually means something is off with the wiring: in a well designed and built system this should not happen.
Most recently I noticed the same thing using an Appl... | {
"domain": "physics.stackexchange",
"id": 23637,
"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": "electricity",
"url": null
} |
modulation
So, I try to prove the $s_{FM}(t)$ is a FM signal
The instantaneous frequency is $f(t)= \frac {d\psi}{dt}=2\pi f_c+2 \pi s'(t) t +2 \pi s(t)$
and the instantaneous carrier ferquency is $f_{carrier} (t)=\frac{d\psi_{carrier}}{dt}=\frac {d}{dt} [2 \pi f_c t + \theta]=2 \pi f_c$. Assume the carrier signal is $... | {
"domain": "dsp.stackexchange",
"id": 683,
"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": "modulation",
"url": null
} |
acid-base, kinetics, isotope
it is wrong for the above reason.
Two genuine thermodynamic equilibriums are
$\ce{2H2O <=> H3O+ + HO-}$ and $\ce{2D2O <=> D3O+ + DO-}$
Experimentally, the self-dissociation constants of $\ce{H2O}$ to $\ce{H3O+}$ and $\ce{OH-}$ and $\ce{D2O}$ to $\ce{D3O+}$ and $\ce{OD-}$ can be measured ... | {
"domain": "chemistry.stackexchange",
"id": 9098,
"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": "acid-base, kinetics, isotope",
"url": null
} |
newtonian-mechanics, energy, potential-energy, harmonic-oscillator, dissipation
Title: Potential Energy of Damped Oscillator In the case of a simple harmonic oscillator we know that the total energy of the system is given as
$$E=\frac{1}{2}m\dot{x}^2+\frac{1}{2}kx^2$$
where the potential is
$$U=\frac{1}{2}kx^2$$ | {
"domain": "physics.stackexchange",
"id": 46011,
"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, energy, potential-energy, harmonic-oscillator, dissipation",
... |
general-relativity, spacetime, metric-tensor, symmetry
If you have found any two Killing fields $\xi$ and $\eta$, the group structure may teach you something. Because the composition of two isometries is another isometry, there is a corresponding statement for infinitesimal isometries. This will be familiar if you kno... | {
"domain": "physics.stackexchange",
"id": 10887,
"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, spacetime, metric-tensor, symmetry",
"url": null
} |
java, security, cryptography, aes
if (name.endsWith(".TXT"))
return "text/plain";
else if (name.endsWith(".CSV"))
return "text/csv";
else if (name.endsWith(".HTM") || name.endsWith(".HTML"))
return "text/html";
else if (name.endsWith(".JPG") || name.endsWith(... | {
"domain": "codereview.stackexchange",
"id": 30955,
"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, security, cryptography, aes",
"url": null
} |
c++, object-oriented, design-patterns, event-handling
return listenerID;
}
void unregisterListener(EventListenerID& listenerID)
{
listeners.erase(
std::remove_if(listeners.begin(), listeners.end(), [&listenerID](const auto& listener) {
return listenerID.get() == listene... | {
"domain": "codereview.stackexchange",
"id": 44801,
"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++, object-oriented, design-patterns, event-handling",
"url": null
} |
---- 75 VARIABLE x.L final values
c1 c2 c3 c4 rowsum
r1 84.265 10.467 4.993 0.275 100.000
r2 89.460 7.431 2.984 0.125 100.000
r3 92.057 5.912 1.980 0.050 100.000
r4 86.863 8.949 3.988 ... | {
"domain": "blogspot.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9559813463747182,
"lm_q1q2_score": 0.8007490544850998,
"lm_q2_score": 0.8376199572530449,
"openwebmath_perplexity": 1491.8920483015406,
"openwebmath_score": 0.7800690531730652,
"tags": ... |
of numeric conversions of measurements? Click here to toggle editing of individual sections of the page (if possible). Transpose of matrix M is represented by M T. There are numerous ways to transpose matrices.The transpose of matrices is basically done because they are used to represent linear transformation. A + B = ... | {
"domain": "charlottegroutars.nl",
"id": null,
"lm_label": "1. Yes\n2. Yes\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9886682478041813,
"lm_q1q2_score": 0.8983216640840999,
"lm_q2_score": 0.9086178969328287,
"openwebmath_perplexity": 714.0621717159065,
"openwebmath_score": 0.5960926413536072,... |
electromagnetism, photons, double-slit-experiment, diffraction
To test this assumption I would like to suggest you to make a simulation. I presume that you must be familiar with some high level programming language like matlab or python.
Take a plane wave of wave vector $k$ (since you are dealing with time stationary... | {
"domain": "physics.stackexchange",
"id": 32372,
"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, photons, double-slit-experiment, diffraction",
"url": null
} |
navigation
automated navigation
i am not able to understand the complexity of the problem.
please help me to understand "how can i switch between cmd_vel used by teleop & cmd_vel used by move_base"
Originally posted by sumant on ROS Answers with karma: 77 on 2014-10-21
Post score: 0
Take a look at the assisted_tele... | {
"domain": "robotics.stackexchange",
"id": 19809,
"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": "navigation",
"url": null
} |
generics, typescript
can be
foldl((a, b) => (a + b), 0, [1,2,3,4,12,14,15,16])
It's a good idea to let TypeScript automatically infer the types of variables and parameters whenever possible - less code to read makes comprehension easier. You can do the same thing for MMap and Filter.
Outside definition? I'm not entir... | {
"domain": "codereview.stackexchange",
"id": 39627,
"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": "generics, typescript",
"url": null
} |
electromagnetism, magnetic-fields
To clarify, lets say you have a loop of coil and you drop a magnet through the coil. This is will produce an emf according to Faraday's law. Now if you have a loop of coil with a larger radius, and you drop the same magnet through at the same speed, it will produce a smaller emf. Why ... | {
"domain": "physics.stackexchange",
"id": 26891,
"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",
"url": null
} |
sociality, territoriality
Title: Is territoriality only the domain of the male of a species? Is territoriality (recognizing a geographic location, and challenging another member of the same species and gender) only in the domain of the male of a species? Are there any species out there where the female of the species ... | {
"domain": "biology.stackexchange",
"id": 714,
"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": "sociality, territoriality",
"url": null
} |
Vol 108 (2001), 512-521. Find out more about how to implement The Project Approach in the classroom with this free downloadable Study Guide. Computer Modeling. In the video clips in this pack, Dr Julia Gog and Dr Andrew Conlan, of the University of Cambridge, explain using a variety of simple models. Teacher: Mr. For e... | {
"domain": "mascali1928.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9770226260757067,
"lm_q1q2_score": 0.8435531501284119,
"lm_q2_score": 0.8633916222765627,
"openwebmath_perplexity": 2166.8251969311536,
"openwebmath_score": 0.29697713255882263,
"... |
php, mysql, database, pdo, mysqli
Initialization. Usually it's done in a separate file that's either includes the current script, or being included into it.
Input validation (if any)
Data manipulation.
Output (if any)
Security should be your foremost concern
in SQL, always use parameters instead of PHP variables for... | {
"domain": "codereview.stackexchange",
"id": 45011,
"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, mysql, database, pdo, mysqli",
"url": null
} |
c++
Let's call this function:
compareBinary(const char *string, size_t check_n_bits, size_t skip_b_bits)
As there are a couple of methods and a class I can't post here (for the sake of this question), you're free to explore the entire code here.
How is this function used? The function is a method of an object that co... | {
"domain": "codereview.stackexchange",
"id": 16008,
"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
} |
special-relativity, speed-of-light
The coordinate transformations which preserve this $(+ - - -)$ inner product are known as the "Lorentz group" of transformations. They consist of usual rotations and reflections among $x, y, \text{ and } z$ combined with reflections of $w$ and a special operation that mixes space and... | {
"domain": "physics.stackexchange",
"id": 24207,
"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, speed-of-light",
"url": null
} |
Subsets and Splits
No community queries yet
The top public SQL queries from the community will appear here once available.