text stringlengths 1 1.11k | source dict |
|---|---|
by an equation; Sketch (mathematics), a generalization of algebraic theory A summary of a mathematical proof; Software and computing. This is achieved by adding a sketch relation to your finished curve. how to sketch a curve that has asymptotes. You should be able to quickly sketch straight-line graphs, from your knowl... | {
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"lm_q2_score": 0.8577681122619883,
"openwebmath_perplexity": 1251.2958620737718,
"openwebmath_score": 0.5482892990112305,
"tags"... |
error-correction, stim
There's an open issue to fix this. There's a few reason this functionality hasn't been implemented yet. It's kind of unphysical to rely on this information (though it has its uses, e.g. bootstrapping machine learning decoders). But more seriously... the information is just kind of complicated. J... | {
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"tags": "error-correction, stim",
"url": null
} |
array, vba, excel
Next r
tempbook.Close
End Sub
Sub Print_output()
Sheets("Output").Select
Set Destination = Range("a2")
Destination.Resize(UBound(aNavRec, 1) + 1, UBound(aNavRec, 2)).Value = aNavRec
End Sub I propose the following refactoring based on:
use of arrays to range and viceversa
though tempered by the ... | {
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"tags": "array, vba, excel",
"url": null
} |
filters, frequency-spectrum, transfer-function
Let's say that I want to create an audio effect that is a sort of "reverse echo." In other words, I want to hear an echo of the sound before the sound event actually occurs. This would be an example of non-causal processing because at any given time, the output depends ... | {
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"tags": "filters, frequency-spectrum, transfer-function",
"url": null
} |
ros, nodes
But when I run this node, the statement
"ROS_INFO("Extracting the elements of the vector from file");"
is not at all executed
What could probably be going wrong?
Originally posted by anonymous25787 on ROS Answers with karma: 31 on 2016-03-01
Post score: 0
I'm guessing, you have the file in the wrong loc... | {
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"tags": "ros, nodes",
"url": null
} |
electromagnetism, inductance, magnetic-moment
$$M_{iron}= {\chi}{H}{(A×l)}$$
Where, $\chi$ is the magnetic susceptibility and
${H}$ is the magnetic intensity.
I am not going deep into H and $\chi$(which depends upon the material and is much greater than 1 for ferromagnetic materials)
$$M_{total}= M_{iron} + M_{solenoi... | {
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ros, ros-kinetic, avoid-obstacle
@wangludong
I had the same problem for publishing a point in RViz by using that but. I suggest using a python code for publishing a position you can find a sample easily by googling.
@cwhong I also did the same, I set the output frame of "lidar_euclidean_cluster_detect" to "map" but no... | {
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"tags": "ros, ros-kinetic, avoid-obstacle",
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# Am I allowed to use distributive law for infinitely many sets?
Let $X$ be a nonempty set. A collection $S$ of subsets of $X$ is called a semiring if it satisfies the following properties:
1. The empty set belongs to S; that is $\emptyset \in S$.
2. If $A,B \in S$; then $A \cap B \in S$; that is, $S$ is closed under... | {
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"openwebmath_score": 0.9735369682312012,
"tag... |
general-relativity, black-holes, mass-energy, event-horizon, observers
However if you start adding a lot of mass to the black hole, the situation changes. Imagine you throw a little object towards the event horizon. It "seems" to freeze on the surface of the horizon (it actually visually disappears due to the red shif... | {
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"tags": "general-relativity, black-holes, mass-energy, event-horizon, observers",
"url": ... |
java, datetime
Title: GregorianCalendar I have to create a class Data with dates and there should be some methods and constructor. Maybe some method can be done in another way, especially the method wichIsEarlier, because I made it static and I'm not really sure about it. Please take a look on this class and say what ... | {
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} |
this handout contains 7 examples on finding arc equation! Radians and r is the radius of the arc along the circumference of the central angle of a circle radians... Convert it to radians. cut off by the angle is in radians with an arc length step-by-step! Of an angle is in radians. off by the angle is the radius of the... | {
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"lm_q2_score": 0.826711791935942,
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"openwebmath_score": 0.9186582565307617,
"tags"... |
• @MichaelHardy I actually had my class run through this computation in small groups in class today. While it's true that many of them were longing for the Fundamental Theorem of Calculus they "learned" in high school and could give them the answer in about 5 seconds, there were more than a few who really were apprecia... | {
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"lm_q1q2_score": 0.8649690049689623,
"lm_q2_score": 0.8856314723088732,
"openwebmath_perplexity": 643.5405233032401,
"openwebmath_score": 0.855930745601654,
"tags... |
c++, object-oriented, priority-queue
with
std::copy(q.begin(), q.end(), items.begin());
Your search_position function could be replaced by std::binary_search (or at least constructed using it).
Error conditions
You use a int& overflow or int& underflow parameter to indicate an error condition. This is OK in principle... | {
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"tags": "c++, object-oriented, priority-queue",
"url": null
} |
vision, neurophysiology
Why have cones? Because color vision helps to detect and differentiate stuff.
Why have rods? Because night vision is helpful.
Why have both? To be successfully equipped to thrive in both light and dark environments.
Do we need them both? No - even nocturnal hunters that don't have rods have bee... | {
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"id": 4992,
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"tags": "vision, neurophysiology",
"url": null
} |
python, python-3.x, file-system, linux, hashcode
I am almost sure there is no reason to repeat md5 = hashlib.md5() twice.
"Native" iteration
while i < len (same_size[size]):
# Hash file content with read buffer
md5 = hashlib.md5()
path = same_size[size][i]
...
i=i+1
You are iterating over all the files with the ... | {
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"tags": "python, python-3.x, file-system, linux, hashcode",
"url": null
} |
nuclear-physics, fusion
$$v_{in}(t) = \int_{-\infty}^{t} \frac{F_{in}(t')}{m} dt' = \frac{ k e^2 z_1 z_2 a }{2 v^3 m t^3}$$
$$ y(r) - y_{++} (r) = \int_{-\infty}^{-r/v} v_{in}(t) dt $$
$$ a - a_{++} = v_{in}(r) \frac{r}{v} + ( y(r) - y_{++} (r) ) = \frac{ k e^2 z_1 z_2 /r }{m v^2} a$$
This gives the difference in cro... | {
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"tags": "nuclear-physics, fusion",
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} |
conservation-laws, symmetry, field-theory, noethers-theorem
My Confusion: I don't see how $\mathcal{L} = \frac{1}{2} (\partial_{\mu} \phi)^2$ satisfies the Euler-Lagrange equation. Because on the left hand side, I get $\frac{\partial\mathcal{L}}{\partial\phi} = 0$, and on the right hand side, I get $\partial_{\mu}\lef... | {
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"tags": "conservation-laws, symmetry, field-theory, noethers-theorem",
"url": null
} |
bash, shell
# Exit as soon as a command fails
set -e
# Accessing an empty variable will yield an error
set -u
# Assume the working directory is the path to the dotfiles repository
REPO_PATH="$PWD/"
# Abort mission when we’re not in a git repository
if [[ ! -d .git ]] || ! git rev-parse --git-dir > /dev/null 2>&1; t... | {
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"tags": "bash, shell",
"url": null
} |
vba, excel
Unique_Identifier = .Range("B5").value
Wire_Type = "Deposit/Loan"
Call Find_Recurring(Unique_Identifier, Wire_Type)
Sheet7.Visible = xlSheetVisible 'Checklist
Sheet4.Visible = xlSheetVisible 'Confirmation-Outgoing-1
... | {
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"tags": "vba, excel",
"url": null
} |
deep-learning, data-mining, data-cleaning, transformation
Title: Should i always transform data to normal distribution? I am trying to understand transformations but this question seems to be in my and some people's mind. If we have a numeric variable in EVERY data science case. Transforming data(Log, power transforms... | {
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"url": null
} |
the simplest type of coordinate system, where the reference axes are orthogonal (at right angles) to each other. Syntax: set mapping {cartesian | spherical | cylindrical} A cartesian coordinate system is used by default. $\endgroup$ – paisanco Jun 14 '14 at 15:57 pol2cart. 1213 0 -5]' x = 4×1 1. To run this script: Dow... | {
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"openwebmath_score": 0.931949257850... |
If $A$ is invertible, there is a matrix $B$ with
$AB = I; \tag 1$
then
$\vert AB \vert = \vert I \vert = 1; \tag 2$
but
$\vert AB \vert = \vert A \vert \vert B \vert; \tag 3$
thus
$\vert A \vert \vert B \vert = I, \tag 4$
which of course prohibits $\vert A \vert = 0$; we are left with the sole option
$\vert A ... | {
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"lm_q2_score": 0.8354835391516133,
"openwebmath_perplexity": 194.33921469355943,
"openwebmath_score": 0.9169889688491821,
"tag... |
waves, fourier-transform, string, degrees-of-freedom
But the usual concept of a wave packet is a single bump. This is impossible to make using a Fourier series. You can reduce the step $\Delta k$ between wavenumbers of the harmonics (thus increasing the amount of numbers—degrees of freedom), which will let you increas... | {
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"tags": "waves, fourier-transform, string, degrees-of-freedom",
"url": null
} |
ros, sicklms, sicktoolbox-wrapper
[ WARN] [1331088809.937633610]: A scan was probably missed. The last scan was 0.108182 seconds ago.
[ WARN] [1331088810.044203805]: A scan was probably missed. The last scan was 0.106572 seconds ago.
[ WARN] [1331088810.148826941]: A scan was probably missed. The last scan was 0.10462... | {
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"tags": "ros, sicklms, sicktoolbox-wrapper",
"url": null
} |
ros, rosservice, actionlib, best-practices, rostopic
Title: When should I use topics vs services vs actionlib actions (vs dynamic_reconfigure)?
Please help in writing up a ROS best practice.
Originally posted by mmwise on ROS Answers with karma: 8372 on 2011-11-07
Post score: 40
Topics should be used for continuou... | {
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} |
neurophysiology, action-potential
What if you had no K+ conductance, including no K+ leak channels? Well, then it doesn't matter at all what the relative concentration of K+ is inside and outside the cell: check the Goldman equation! You can't really have no conductance to anything at all, but if there is no dominant... | {
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"tags": "neurophysiology, action-potential",
"url": null
} |
cc.complexity-theory, ds.algorithms, randomness, randomized-algorithms, recursive
Lemma 1. For this modified algorithm, regardless of the random choices of the algorithm, the time is always $O(n\,m)$.
Proof. Fix an input $A[1..n]$ and $B[1..m]$ and fix the random
choices of the algorithm arbitrarily. In each (possib... | {
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python, python-3.x, database
If both key and value:
Return position in database the first pair was found.
If just key:
Return value associated with key.
If just value:
Return all keys with associated value.
"""
if not self.connected:
... | {
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} |
general-relativity, cosmology, spacetime, big-bang, singularities
If it helps to make things clearer, exactly the same happens with an object falling into a black hole. A geodesic that crosses the horizon must reach the singularity and it cannot be analytically continued forward in time past the singularity. Hence the... | {
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"tags": "general-relativity, cosmology, spacetime, big-bang, singularities",
"url": null
... |
rna-seq, differential-expression
What we would like to do is compare n=6 Vs 100 + 5 normals. What steps should we be considering before we move ahead with this analysis? Adding experiments 1 & 2 should be fine without modification on the computer side of things, as long as your sample preparation is consistent. To be ... | {
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"id": 315,
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"tags": "rna-seq, differential-expression",
"url": null
} |
has been applied to stock trading, but research examining the technique has found little to no evidence that it is useful in practice. Before looking at further examples of Fourier series it is useful to distinguish two classes of functions for which the Euler-Fourier formulas for the coefficients can be simplified. A ... | {
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"openwebmath_score": 0.8784337043762207,
"tags": null... |
materials, structural-analysis, composite
= \frac{7840\ \textrm{N}\cdot\textrm{m}^3}{7.1\times 10^{5}\ \textrm{N}\cdot\textrm{m}^{2}} \\
= 0.011\ \textrm{m} \\
\approx 1\ \textrm{cm}
$$
Which is your desired value, but with no safety factor. I've assumed for simplicity that the neutral axis is at the midplane, which i... | {
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performance, beginner, sql, sqlite
When a name is entered in "ESPECE", the table ESPECES_ATTRIBUTS is updated with the same "ESPECE", "REGION" and "COMPART" (if it does not already exist) and triggers are executed to search in several databases, a list of information. *I use 2 layers because the 1rst one can contain m... | {
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"tags": "performance, beginner, sql, sqlite",
"url": null
} |
javascript, html, css
// Getting only the links that are in .navigation
var links = document.querySelectorAll('.navigation a[href="'+document.URL+'"]');
// More specific CSS
.navigation a.active {background:red;}
className
Now you have to note that setting className replaces it with the value, like this example. If ... | {
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"url": null
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matlab, discrete-signals, sampling, autoregressive-model, extrapolation
As can be seen in the picture, the PACF dips below the confidence interval at the value highlighted in red. This is the 24th value in the sequence, so we use 23 as our model order. The code I used is shown below.
N = 150; % Order of LPC auto-re... | {
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"url": nul... |
osx
cd /tmp/gazebo-8qUtmK/gazebo-1.9.6/build/gazebo/rendering && /usr/local/Library/ENV/4.3/clang++ -DMAC_OS_X_VERSION=1080 -Dgazebo_rendering_EXPORTS -O3 -DNDEBUG -Wall -Wextra -Wno-long-long -Wno-unused-value -Wno-unused-value -Wno-unused-value -Wno-unused-value -Wfloat-equal -Wshadow -Winit-self -Wswitch-default -W... | {
"domain": "robotics.stackexchange",
"id": 20083,
"lm_label": null,
"lm_name": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "osx",
"url": null
} |
special-relativity, speed-of-light, mass, faster-than-light
Because energy contributes to an object's inertia (resistance to acceleration), adding a fixed amount of energy has less of an effect as the object moves faster. This effect is only significant to objects moving at speeds close to the speed of light. At 10 pe... | {
"domain": "physics.stackexchange",
"id": 2810,
"lm_label": null,
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"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "special-relativity, speed-of-light, mass, faster-than-light",
"url": null
} |
algorithms, algorithm-analysis, proof-techniques, lower-bounds
I understand the merging problem. But how could I write one for selection and insertion sort? From your comment, it seems you are confusing the meaning of lower bounds, upper bounds and asymptotic notation. For instance, take Insertion Sort. Its best-case ... | {
"domain": "cs.stackexchange",
"id": 166,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "algorithms, algorithm-analysis, proof-techniques, lower-bounds",
"url": null
} |
algebraically, graphically and verbally. Exponential Function Reference. Logarithm and logarithm functions This is a very important section so ensure that you learn it and understand it. Use the properties of exponents to interpret expressions for exponential functions. In mathematics, specifically in category theory, ... | {
"domain": "umood.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.981735720045014,
"lm_q1q2_score": 0.8511999843866641,
"lm_q2_score": 0.8670357683915538,
"openwebmath_perplexity": 944.1857117142524,
"openwebmath_score": 0.4596410393714905,
"tags": null,
... |
special-relativity, energy, mass, momentum, conservation-laws
Title: Conservation of mass in relativistic collisions? It's stated in my textbook that relativistic mass is conserved in collisions, even in inelastic ones. So if you have a particle with rest mass $m$ moving with speed $u$ (considerable fraction of the sp... | {
"domain": "physics.stackexchange",
"id": 53274,
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"openwebmath_score": null,
"tags": "special-relativity, energy, mass, momentum, conservation-laws",
"url": null
} |
elixir, dsl
def identity(doc) do
{:ok, "", doc}
end
end
Tests
defmodule ParsletTest do
use ExUnit.Case
doctest Parslet
defmodule ParsletExample do
use Parslet
rule :test_string do
str("test")
end
root :test_string
end
test "str matches whole string" do
assert ParsletExamp... | {
"domain": "codereview.stackexchange",
"id": 30431,
"lm_label": null,
"lm_name": null,
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"openwebmath_score": null,
"tags": "elixir, dsl",
"url": null
} |
javascript, formatting, google-apps-script
Your placeThousands function can be done a little simpler. There are several ways to do it, but I would cut the string into an array of chunks and then join them together. I would also make it easier to change the chunk size by putting it in a variable.
const chunkSize = 3;
l... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "javascript, formatting, google-apps-script",
"url": null
} |
java, logging
private static Logger getConfiguredLogger(String packageName, String logPathIfNotAlreadySet, Level maxLogLevelIfNotAlreadySet)
{
Logger logger = Logger.getLogger(packageName); // get the logger for the package
if (alreadyProvidedPackages.contains(packageName))
{
re... | {
"domain": "codereview.stackexchange",
"id": 39724,
"lm_label": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, logging",
"url": null
} |
cosmology, black-holes, space-expansion, big-bang, singularities
into a singularity in the universe we know, and the density of the universe was still homogenous. But the scale of it was reduced so much that the distance between everything was essentially zero, despite being an infinite universe, hence the big bang "h... | {
"domain": "physics.stackexchange",
"id": 19673,
"lm_label": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "cosmology, black-holes, space-expansion, big-bang, singularities",
"url": null
} |
machine-learning, data-mining, classification, bigdata, statistics
Title: How to detect overfitting of a stock screener The project I am working on allows users to create Stock Screeners based on both technical and fundamental criteria. Stock Screeners are then "backtested" by simulating the results of applying in ov... | {
"domain": "datascience.stackexchange",
"id": 279,
"lm_label": null,
"lm_name": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "machine-learning, data-mining, classification, bigdata, statistics",
"url": nu... |
Since $b(t)$ and $y(t)$ are both scalars, the system is properly called Single Input, Single Output (SISO).
If $b(t)$ were rather a vector there would be 2 inputs thus making the system a multiple input system. Although $B$ does not directly determine whether the system is single or multiple input, it must conform to ... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9719924850731925,
"lm_q1q2_score": 0.8035576470081852,
"lm_q2_score": 0.8267117898012104,
"openwebmath_perplexity": 439.9587898282924,
"openwebmath_score": 0.9513809084892273,
"tag... |
cosmology, big-bang, neutrinos
and
Is it possible to look into the beginning of the Universe?
but none these ask specifically, or have answers, about what could be seen or probed by the C$\nu$B if we could examine it in detail.
This question is somewhat hypothetical, but if you look at the existing (partial) answers a... | {
"domain": "physics.stackexchange",
"id": 16186,
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"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "cosmology, big-bang, neutrinos",
"url": null
} |
quantum-mechanics, quantum-field-theory
Unruh and Wald, https://arxiv.org/abs/hep-th/9503024
Ellis et al., "Search for violation of quantum mechanics," Nucl Phys B241(1984)381
Gisin, "Weinberg's non-linear quantum mechanics and supraluminal communications," http://dx.doi.org/10.1016/0375-9601(90)90786-N , Physics Lett... | {
"domain": "physics.stackexchange",
"id": 41898,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "quantum-mechanics, quantum-field-theory",
"url": null
} |
newtonian-mechanics, mass, acceleration, inertia
Title: Why does mass cause resistance to acceleration? If I were in a vacuum with no gravity or friction, why would it be harder to push a floating bowling ball than a marble? Is there anything happening on an subatomic level that makes matter act differently when it's ... | {
"domain": "physics.stackexchange",
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"tags": "newtonian-mechanics, mass, acceleration, inertia",
"url": null
} |
There are persons with two foots and less than two hands; so there is no $\iff$ relationship between the two
The source of the confusion here is what $C_1=C_2$ means; since there is no "intrinsic way" to know what does it mean for two completely abstract relationships to be equal, we call them equal if they act in the... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9688561730622295,
"lm_q1q2_score": 0.8468551250226481,
"lm_q2_score": 0.8740772351648677,
"openwebmath_perplexity": 167.6635965507014,
"openwebmath_score": 0.8726533651351929,
"tag... |
thermodynamics
Title: Freeze water bottles during colder nights, and place them in front of a fan during warmer days?
Is this advice correct? Are they alluding to Freezing Point Depression? Adding salt to tap water lowers the Crystalloid's freezing point.
Pour 3 tbsp (51 g) of salt into each of your 3 plastic water ... | {
"domain": "physics.stackexchange",
"id": 77825,
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"openwebmath_score": null,
"tags": "thermodynamics",
"url": null
} |
python, performance, algorithm
for i in range(maxl):
try:
if s.count(l[i]) >= l.count(l[i]):
c.append(a[i])
except IndexError:
pass
return c
How it works, because it might be a little cryptic:
Retrieve the longer and shorter of the two sorted lists, and th... | {
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"openwebmath_score": null,
"tags": "python, performance, algorithm",
"url": null
} |
c, array, vectors, mpi
if (rank < rem) {
local_a = rank * (local_size + 1);
local_b = local_a + local_size;
} else {
local_a = rank * local_size + rem;
local_b = local_a + (local_size - 1);
}
printf("On rank %d I'm computing the sum from %d to %d \n", rank, local_a,
local_b);
for (int... | {
"domain": "codereview.stackexchange",
"id": 44257,
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"openwebmath_score": null,
"tags": "c, array, vectors, mpi",
"url": null
} |
c++
bill100++;
}
else if(bill25>=3)
{
bill25-=3;
bill100++;
}
else
{
cout<<"No change";
exit(0);
}
}
else
{
cout<<"Wrong bill";
... | {
"domain": "codereview.stackexchange",
"id": 38325,
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"lm_name": null,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "c++",
"url": null
} |
the highest or lowest point of intersection between the objective function line and the feasible region on a graph. Nur Fatin Zafirah menyenaraikan 4 pekerjaan pada profil mereka. Cell E13 of the attached example shows a Z value of approximately 1. 6 (Aug 18, 2014): Synced with R release version 3. How to Use Exponents... | {
"domain": "devidcecconi.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9728307668889048,
"lm_q1q2_score": 0.8307125928851632,
"lm_q2_score": 0.853912747375134,
"openwebmath_perplexity": 1195.035000208233,
"openwebmath_score": 0.4464959502220154,
"tags":... |
java, performance, image
Clearly things are being allocated and deallocated, over and over again. Large things, or large number of things. This can happen if you have arrays. Large arrays. Or large number of not so large arrays. The heap is under 2GB, so that's nothing to be scared of.
Threads?
Threads are simple, the... | {
"domain": "codereview.stackexchange",
"id": 16809,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "java, performance, image",
"url": null
} |
c++, object-oriented
Librarian.hh
#ifndef LIBRARIAN_HH
#define LIBRARIAN_HH
/*****************************************************************
* Name: Librarian.hh
* Author: Samuel Oseh
* Purpose: Librarian class method-function prototype
* ***************************************************************/
#include ... | {
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"tags": "c++, object-oriented",
"url": null
} |
dom6527,
You graph is correct.
AND The y value does approach 0 as $$x\rightarrow \pm \infty$$
However, you cannot divide by 0 which means that x cannot equal 0 or +4
There are vertical asymptotes when x =0 and when x=4
If -1
$$y=\frac{4(x+1)}{x(x-4)}\\ y=\frac{4(positive)}{neg*(negative)}\\ y=positive$$... | {
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"lm_q1q2_score": 0.8289477879179714,
"lm_q2_score": 0.8438951104066293,
"openwebmath_perplexity": 2358.8594719801526,
"openwebmath_score": 0.8879162669181824,
"tags": nul... |
quantum-field-theory, terminology
Title: What does the "UV" in "UV completion" stand for? What does the "UV" in "UV completion" stand for?
Also, I'm not sure which tags I should tag this question with. UV stands for Ultraviolet and it is referring to a special kind of divergences in quantum field theory. In NLO loop d... | {
"domain": "physics.stackexchange",
"id": 21019,
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"openwebmath_score": null,
"tags": "quantum-field-theory, terminology",
"url": null
} |
javascript, beginner, object-oriented, game, snake-game
if(tmp==index) {
return currentNode.getX();
}
tmp++;
currentNode= currentNode.next;
}
}
this.setX = function setX(index, value) {
var currentNode = first;
var tmp =0;
while(true) {
if(ind... | {
"domain": "codereview.stackexchange",
"id": 31315,
"lm_label": null,
"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "javascript, beginner, object-oriented, game, snake-game",
"url": null
} |
A simulation in R produces roughly similar results
set.seed(2020)
cases <- 10^5
twos <- numeric(cases)
for (i in 1:cases){ twos[i] <- sum(table(sample(7,7, replace=TRUE)) == 2) }
table(twos)/cases
# twos
# 0 1 2 3
# 0.17502 0.37036 0.34863 0.10599
mean(twos >= 1)
# 0.82498
mean(twos == 1)
# 0.3... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9621075766298657,
"lm_q1q2_score": 0.813887628327257,
"lm_q2_score": 0.8459424373085146,
"openwebmath_perplexity": 609.6666290656896,
"openwebmath_score": 0.650262713432312,
"tags"... |
For the second part, take $w=aw_1+bw_2$ with $a+b=1$, for two points $w_1,w_2$ in the circle. WLOG assume $\mid w_1\mid\leq \mid w_2\mid$. Then: $$\mid w\mid^2=(aw_1+bw_2)(a\overline w_1+b\overline w_2)\leq (a\mid w_1\mid+b\mid w_2\mid)^2\leq \mid w_2\mid^2 \leq 1$$ therefore $w$ lies inside the unit circle and hence i... | {
"domain": "stackexchange.com",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9643214460461698,
"lm_q1q2_score": 0.8289921858044982,
"lm_q2_score": 0.8596637451167997,
"openwebmath_perplexity": 258.2552759251082,
"openwebmath_score": 0.8099651336669922,
"tag... |
ruby
logger.info 'Starting up aggregator now'
logger.info "Using #{options.environment} environment"
@environment = options.environment
DatabaseInitializer.new(options.environment)
return if options.environment == :test
if options.console
ConsoleInitializer.new(options.environment)
el... | {
"domain": "codereview.stackexchange",
"id": 6150,
"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
} |
php, array, sorting
and
$catLists = array(
0 => array('300ml', '500ml', '750ml', '1L', ''),
1 => array('500ml', '750ml', '', '', ''));
will return different results.
If you want to get the same result from both inputs, then you have to loop through the array twice. The fir... | {
"domain": "codereview.stackexchange",
"id": 13543,
"lm_label": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "php, array, sorting",
"url": null
} |
ros
def imu_call():
rospy.init_node('imu_call')
rospy.wait_for_service('imu_controller')
ns.back_ubx = rospy.Publisher('/back_ubx_position_controller/command', Float64)
ns.back_mby = rospy.Publisher('/back_mby_position_controller/command', Float64)
rospy.loginfo( "imu_call node is read... | {
"domain": "robotics.stackexchange",
"id": 12256,
"lm_label": null,
"lm_name": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "ros",
"url": null
} |
• My god this is perfect thank you. Dec 19, 2017 at 7:50
You should never need to use line segments. Instead, try:
f1[t_] := -t + t^2;
f2[t_] := Sin[t];
mycurve[t_] := {f1[t], f2[t]};
testpt = {3, .5};
Minimize[Norm[mycurve[t] - testpt], t]
(* {0.239742, {t -> 2.31493}} *)
closestpt = mycurve[t /. sol[[2]]]
(*... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9407897509188345,
"lm_q1q2_score": 0.8087628490987019,
"lm_q2_score": 0.8596637541053281,
"openwebmath_perplexity": 3091.139423471799,
"openwebmath_score": 0.20390082895755768,
"ta... |
electromagnetism, maxwell-equations
$I_C$ is the conduction current (i.e. moving charges)
regardless why the charges are moving.
This current creates a magnetic field $\mathbf{B}$ wrapping around it.
The second term on the right side
$\left(\epsilon_0\frac{d\Phi(\mathbf{E})}{dt}\right)$
is due to an electric field $\m... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "electromagnetism, maxwell-equations",
"url": null
} |
model-checking, temporal-logic
Title: Are both safety and liveness properties closed under finite intersection? Given two safety properties $P_1$ and $P_2$, is their intersection $P_1 \cap P_2$ also a safety property? Similarly, if $P_1$ and $P_2$ are liveness properties, is $P_1 \cap P_2$ also a liveness property? Sa... | {
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"id": 4633,
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"lm_name": null,
"lm_q1_score": null,
"lm_q1q2_score": null,
"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "model-checking, temporal-logic",
"url": null
} |
python, python-2.x, language-design
if to_write:
with open(writepath, 'w') as outfile:
# Write to the output file
outfile.write(output)
outfile.close()
if to_exec:
# ... | {
"domain": "codereview.stackexchange",
"id": 24444,
"lm_label": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, python-2.x, language-design",
"url": null
} |
java, strings, array, reinventing-the-wheel
indexString++;
}
String[] finalResult=new String[tokens];
for(int i=0;i<tokens;i++){
finalResult[i]=new String(result[i]);
}
return finalResult;
}
}
The split function (with a character as a separator) is really difficult to implement and ... | {
"domain": "codereview.stackexchange",
"id": 23826,
"lm_label": null,
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"lm_q1_score": null,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "java, strings, array, reinventing-the-wheel",
"url": null
} |
It is $$\lim_{n\to \infty} \left(1-\frac{1}{n}\right)^n=e^{-1}$$
Note that
$$\left(\frac{n-1}n\right)^n=\left(1-\frac1n\right)^n=\frac{n-1}{1\times2n}-\frac{(n-1)(n-2)}{1\times2\times3n^2}+\frac{(n-1)(n-2)(n-3)}{1\times2\times3\times4n^3}+\dots$$
which is the binomial expansion theorem.
• I am unsure that this deve... | {
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"openwebmath_score": 0.45385006070137024,
"t... |
c++, memory-management, pointers
return *resource_instance;
} else {
return *dynamic_cast<T*>(found->second.get());
}
}
void unload(const std::string& path) {
resources.erase(path);
}
private:
std::unordered_map<std::string, std::unique_ptr<Resource, ResourceFree>> ... | {
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"tags": "c++, memory-management, pointers",
"url": null
} |
size. Since the number of binomial coefficients n The binomial theorem gives us a formula for expanding $$( x + y )^{n}\text{,}$$ where $$n$$ is a nonnegative integer. is a multiple of The binomial coefficients of that filter represent a discretization of the Gaussian function. ( ( represent the coefficients of the pol... | {
"domain": "sexyloops.tv",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9458012732322216,
"lm_q1q2_score": 0.8314981410529425,
"lm_q2_score": 0.8791467770088163,
"openwebmath_perplexity": 951.1247358981357,
"openwebmath_score": 0.9527801871299744,
"tags": n... |
python, ai, neural-network
. An output must have a consistent number of inputs if it is to exist in
. multiple output vectors.
. A node may only receive one input vector, because it will only be
. processed once per system input.
"""
from ... | {
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"id": 2634,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, ai, neural-network",
"url": null
} |
general-relativity, cosmology, dark-energy, cosmological-constant
Title: Is the cosmological constant the simplest candidate for dark energy? I'm reading this article on Dark matter and dark energy. There is a statement in the document which is as follows
What is the best bet for the nature of dark energy?
...The sim... | {
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"tags": "general-relativity, cosmology, dark-energy, cosmological-constant",
"url": null
... |
Can you take it from here?
• The first integral would then become $\frac{1}{2} \arcsin(x)$ and for the second integral you would have to use $u-$substitution and the solution to it would be $\frac{\arcsin(x)+x\sqrt{1-x^2}}{4}$. Combining the solutions would then give me the solution for the original integral. Jan 24 '... | {
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"lm_label": "1. YES\n2. YES",
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"lm_q1q2_score": 0.8113791279053997,
"lm_q2_score": 0.8267117919359419,
"openwebmath_perplexity": 261.77611016782623,
"openwebmath_score": 0.9870361685752869,
"ta... |
away from the wall, at the rate of$2m/sec$. A function f from A to B is called onto if for all b in B there is an a in A such that f (a) = b. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. Your IP: 198.27.6... | {
"domain": "wstarcorp.com",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9648551535992067,
"lm_q1q2_score": 0.8181660599032922,
"lm_q2_score": 0.8479677564567913,
"openwebmath_perplexity": 502.70557738928767,
"openwebmath_score": 0.7554490566253662,
"ta... |
audio, music, oscillator
But beyond that, is there just a completely different approach that would be more efficient?
And if this is the best approach, are there any things I should think of when pursuing it?
Edit - Thanks for great answers below. I've ended up doing something fairly simple (and possibly crude) for t... | {
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"tags": "audio, music, oscillator",
"url": null
} |
c, data-visualization, ascii-art
Initializing your variables
Getting the words from the user (during which it calculates the histogram)
Displaying the histogram
I'd make at least 2 functions. Initializing the array is fine where it is for now. In the future, you might have more complex data structures you use to keep... | {
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"id": 15576,
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"openwebmath_score": null,
"tags": "c, data-visualization, ascii-art",
"url": null
} |
I am confused how you would begin to answer this. Each field has a lot of different irreducible polynomials.
Thanks!
-
Based on the definition you have, which is standard, it only makes sense to speak of the splitting field of a polynomial. Of course $\mathbb{C}$ is a splitting field over $\mathbb{R},$ namely of $x^2... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
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"openwebmath_perplexity": 232.12174922977593,
"openwebmath_score": 0.9154336452484131,
"ta... |
bacteriology, cellular-respiration
Title: How do prokaryotes perform cellular respiration without membrane-bound organelles? In order to survive, prokaryotes such as bacteria need to produce energy from food such as glucose. In eukaryotic cells, respiration is performed by mitochondria, but prokaryotic cells do not ha... | {
"domain": "biology.stackexchange",
"id": 8572,
"lm_label": null,
"lm_name": null,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "bacteriology, cellular-respiration",
"url": null
} |
control, quadcopter, pid, raspberry-pi, stability
//Motor Control - Mixing
//Motor Front Left (1)
float motorPwm1 = -pitchPID + rollPID - yawPID + baseThrottle + baseCompensation;
What I tried to do now is to implement a derivative on measurement method from this article to remove derivative output spikes. Howev... | {
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"id": 952,
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"tags": "control, quadcopter, pid, raspberry-pi, stability",
"url": null
} |
c++, sqlite, wrapper
EXPECT_EQ(db.insert_into("contacts", fields), SQLITE_OK);
int lastrowid = db.last_insert_rowid();
const std::vector<sql::where_binding>& bindings {
{"rowid", lastrowid}
};
std::vector<std::map<std::string, sql::sqlite_data_type>> results;
EXPECT_EQ(db.select_star("... | {
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"id": 41239,
"lm_label": null,
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"lm_q1_score": null,
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"openwebmath_score": null,
"tags": "c++, sqlite, wrapper",
"url": null
} |
java, homework, pathfinding
(Or else, at least create readable constants for the ints in the if statements)
Consider coding the directions in an enum :
enum Direction {
UP(0,-1), LEFT(-1,0), RIGHT(1,0), DOWN(0,1); | {
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"openwebmath_score": null,
"tags": "java, homework, pathfinding",
"url": null
} |
rust
fn get_mode<T: Eq + Hash>(frequencies: HashMap<T, usize>) -> HashSet<T> {
let mut modes = HashSet::new();
let mut highest_frequency = 0;
for (value, frequency) in frequencies {
match frequency.cmp(&highest_frequency) {
std::cmp::Ordering::Less => {}
std::cmp::Ordering::... | {
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "rust",
"url": null
} |
navigation, ros-melodic, base-global-planner, move-base, baseglobalplanner
Edit the header of the source code of the global_planner package (this is the default global planner used in ROS 1), to add the name of your service. For example in line 186, add ros::ServiceClient isaac_plan_client; At the top of this same fil... | {
"domain": "robotics.stackexchange",
"id": 36583,
"lm_label": null,
"lm_name": null,
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"lm_q1q2_score": null,
"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "navigation, ros-melodic, base-global-planner, move-base, baseglobalplanner",
"u... |
Question Next question Transcribed Image text from this question notebook is available at my examples... Are available for purchase at Packt Publishing an IPython notebook just stopped rendering properly right-hand side is by! Linear system ): 6 available at my github examples repository,.! February 2016 Tags Sympy / d... | {
"domain": "poniewierski.pl",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9399133498259924,
"lm_q1q2_score": 0.8026040030746284,
"lm_q2_score": 0.8539127603871312,
"openwebmath_perplexity": 1946.0947842320945,
"openwebmath_score": 0.556063711643219,
"tags"... |
has an added feature. Perimeter of a Parallelogram. A parallelogram with all 4 interior angles congruent to each other is called a rectangle. This can be done according to the Pythagoras theorem since the triangles formed on the intersection of the diagonals are right-angled. Even though the diagonals intersect each ot... | {
"domain": "carveron.hu",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9838471618625456,
"lm_q1q2_score": 0.8066497358983177,
"lm_q2_score": 0.8198933403143929,
"openwebmath_perplexity": 530.8783392808342,
"openwebmath_score": 0.6075930595397949,
"tags": nu... |
c#, performance, file-system
static String HumanReadableByteCount(long bytes, Boolean si = false, int precision = 2)
{
int unit = si ? 1000 : 1024;
if (bytes < unit) return bytes + " B";
int exp = (int)(Math.Log(bytes) / Math.Log(unit));
String pre = (si ? "kMGTP... | {
"domain": "codereview.stackexchange",
"id": 18922,
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"tags": "c#, performance, file-system",
"url": null
} |
ros, build
[rosmake-2] Starting >>> sensor_msgs [ make ]
[rosmake-0] Starting >>> rosservice [ make ]
[rosmake-0] Finished <<< rosservice ROS_NOBUILD in package rosservice
[rosmake-0] Starting >>> roswtf [ make ]
[rosmake-2] Finished <<< sensor_msgs ROS_NOBUILD in package sensor_msgs
[rosmake-0] Finished <<< roswtf RO... | {
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"id": 9351,
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"openwebmath_score": null,
"tags": "ros, build",
"url": null
} |
ros2, docker, macos
If you used the first example - it should have worked.
ros2 run demo_nodes_cpp listener &
ros2 run demo_nodes_cpp talker
Did it?
Did you start the Docker container detached and connect two terminal sessions to the same container? (That should have worked without needing a network.)
If you started... | {
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"openwebmath_score": null,
"tags": "ros2, docker, macos",
"url": null
} |
visible-light, everyday-life, physical-chemistry, combustion
Just like this guy's, the color of my stove's flames were affected by the humidifier as well.
Why does this happen?
Is it a good thing or a bad thing ? OK, this question appears to have generated some controversy. On the one hand is the answer by niels niels... | {
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"openwebmath_score": null,
"tags": "visible-light, everyday-life, physical-chemistry, combustion",
"url": null
} |
lexical-analysis, code-generation
Title: What makes a nested function in gcc so complicated? Disclaimer: I'm not a compiler expert, but some of my best friends are! :)
I do a lot of embedded systems programming where stack (and other memory) is limited. Most of my code is written in gcc, so I thought nested function... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "lexical-analysis, code-generation",
"url": null
} |
quantum-information, wavefunction, entropy, information
Another caveat worth mentioning is black holes. People are still trying to figure out how information that falls into a black hole could possibly be conserved, or if it's gone even in principle, or what. See: black hole information paradox. | {
"domain": "physics.stackexchange",
"id": 30315,
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"lm_name": null,
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"openwebmath_score": null,
"tags": "quantum-information, wavefunction, entropy, information",
"url": null
} |
\begin{align*} (1+2\theta\mu)u^{n+1}_j &> \theta\mu(u^{n+1}_{j-1} + u^{n+1}_{j+1})\\ &+ (1-\theta)\mu(u^n_{j-1} + u^n_{j+1})\\ &+ [1-2(1-\theta)\mu]u^n_j\\ &= (1+2\theta\mu)u^{n+1}_j \end{align*}
which is a contradiction. It follows that the maximum must also be attained at all of the temporal and spatial neighbors of... | {
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"lm_label": "1. YES\n2. YES",
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"lm_q2_score": 0.8175744850834648,
"openwebmath_perplexity": 219.83783557951486,
"openwebmath_score": 0.9814105033874512,
"ta... |
If all off-diagonal entries of $$M$$ were non-zero we could subtract $$X_1$$. So, without loss of generality, we can suppose that $$M_{12}=0$$.
CASE 1. If no row of $$M$$ has three or more zeroes.
Without loss of generality we can suppose that $$M$$ has the following form where $$A,B,C,D,E,F$$ are all non-zero.
$$M=... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9814534333179649,
"lm_q1q2_score": 0.8810461238258918,
"lm_q2_score": 0.8976952893703477,
"openwebmath_perplexity": 139.25253142353588,
"openwebmath_score": 0.858691394329071,
"tag... |
machine-learning, classification, r, visualization, svm
Dimension 4 is color (0..255)
Dimension 5 is thickness of the symbol
Dimension 6 requires animation. It is a frequency of vibration of a dot on the screen.
In static, printed versions, one can replace frequency of vibration by blur around the point, for a compa... | {
"domain": "datascience.stackexchange",
"id": 150,
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "machine-learning, classification, r, visualization, svm",
"url": null
} |
collision, higgs, leptons
Title: Ideal energy to study higgsstrahlung at a lepton collider Referring to this diagram: | {
"domain": "physics.stackexchange",
"id": 22964,
"lm_label": null,
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"openwebmath_score": null,
"tags": "collision, higgs, leptons",
"url": null
} |
homework-and-exercises, lagrangian-formalism, conservation-laws, field-theory, noethers-theorem
$$ j^{\mu}~:=~ \frac{\partial {\cal L}}{\partial d_{\mu}\phi}\cdot(1-n/2 -x^{\nu}d_{\nu} )\phi+ {\cal L}\cdot x^{\mu}
~=~ d^{\mu}\phi\cdot(1-n/2 -x^{\nu}d_{\nu} )\phi
+ {\cal L}\cdot x^{\mu}.\tag{G} $$
It is straightforwa... | {
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"id": 49595,
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"openwebmath_score": null,
"tags": "homework-and-exercises, lagrangian-formalism, conservation-laws, field-theory, noe... |
frequency-spectrum, probability-distribution-function
As suggested by the central limit theorem, the result after filtering will be Gaussian so it is only the total span which need be adjusted to compensate for the reduced signal power from the filtering. It is for this reason that quantization noise at the output of ... | {
"domain": "dsp.stackexchange",
"id": 11095,
"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": "frequency-spectrum, probability-distribution-function",
"url": null
} |
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