text stringlengths 1 1.11k | source dict |
|---|---|
c++, matrix, template
auto out = CreateVector(rows, cols, loc);
for (T2 row = 0; row < rows; ++row)
{
for (T2 col = 0; col < cols; ++col)
{
auto x = ((double(rand()) / RAND_MAX) * scale) + a2;
out[row][col] = x;
}
}
return out;
}
// template class to sub... | {
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"tags": "c++, matrix, template",
"url": null
} |
# Is $\frac{200!}{(10!)^{20} \cdot 19!}$ an integer or not?
A friend of mine asked me to prove that $$\frac{200!}{(10!)^{20}}$$ is an integer
I used a basic example in which I assumed that there are $200$ objects places in $20$ boxes (which means that effectively there are $10$ objects in one box). One more condition... | {
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"lm_q1_score": 0.9843363512883316,
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"lm_q2_score": 0.870597270087091,
"openwebmath_perplexity": 416.9148791756454,
"openwebmath_score": 0.780359148979187,
"tags"... |
3 or mm 3; Online Parabolic Half Property Calculator. finding centroid of a mask. Thus the development of volume formulas are important for students, as is the careful memorizing of the key formulas, such as the volume of. The centroid of a uniformly dense planar lamina, such as in figure (a) below, may be determined e... | {
"domain": "cmsilsole.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9838471689667878,
"lm_q1q2_score": 0.8155490956560412,
"lm_q2_score": 0.8289388040954683,
"openwebmath_perplexity": 576.2582869823143,
"openwebmath_score": 0.5765584707260132,
"tags... |
-
Nice answer! I didn't realize that it would be reasonable to approximate this by hand. – David Speyer Sep 14 '10 at 19:13
@Qiaochu: You nailed it. Monte-Carlo simulation yields 0.441 good to +-1 in the last digit (based on 1,000,000 trials). Mathematica's exact answer is $\frac{24640023278776239987266530153742054927... | {
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"lm_q1_score": 0.9833429599907709,
"lm_q1q2_score": 0.8194438680815835,
"lm_q2_score": 0.8333245891029457,
"openwebmath_perplexity": 362.0952875043871,
"openwebmath_score": 0.8250206112861633,
"tag... |
logic, artificial-intelligence, first-order-logic, unification
Thanks.
Pseudocode from Artificial Intelligence A Modern Approach (3rd Edition): Figure 9.1, page
328:
function UNIFY(x, y, theta) returns a substitution to make x and y identical
inputs: x, a variable, constant, list, or compound expression
y... | {
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"openwebmath_score": null,
"tags": "logic, artificial-intelligence, first-order-logic, unification",
"url": null
} |
binary-trees
A binary tree in which every level (depth), except possibly the deepest, is completely filled. At depth n, the height of the tree, all nodes must be as far left as possible.
Which one is more accurate?
I know these definitions can vary from author to author, but what could be the underlying philosophy fo... | {
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} |
$$1\le\sqrt[n]n\le{\sqrt n+\sqrt n+1+\cdots+1\over n}={2\sqrt n+(n-2)\over n}=1+{2\over\sqrt n}-{2\over n}$$
and the Squeeze Theorem gives the limit $\sqrt[n]n\to1$.
Here the issue is that $n \rightarrow \infty$, but for any fixed $x > 0$ we have $x^{1/n} \rightarrow 1$. So to consider $n^{1/n}$ you have to ask which... | {
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"lm_q2_score": 0.8596637541053281,
"openwebmath_perplexity": 238.93009458023042,
"openwebmath_score": 0.9748125672340393,
"ta... |
algorithms, optimization
Title: Optimising an exhaustive search for a card game I'd like to search for a combination of resources that when used, would produce at least up to a threshold of different kinds of materials. For the majority who are not in the know, I'll use an analogue for the rest of the question. For th... | {
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"openwebmath_score": null,
"tags": "algorithms, optimization",
"url": null
} |
algorithm, c, linked-list
/* Reverse elements in list. Returns reversed list. O(n) complexity. */
list_t* list_reverse(list_t* list);
/* Insert list elements from list2 into list1 after node pos. list2 is
invalidated after the splice - DO NOT call list_free on list2 after splicing.
Arguments:
list1 - list to splice... | {
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"tags": "algorithm, c, linked-list",
"url": null
} |
python, node.js, linux, react.js, dockerfile
Title: Dockerfile to install Python and React in Linux container I am learning how to use Docker. I'm creating a container that contains Python and React. This code works, but it seems so heavy when I install it. I only want React, but to get React, I install Node so I can ... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "python, node.js, linux, react.js, dockerfile",
"url": null
} |
discrete-signals, power-spectral-density, autocorrelation, signal-power
Title: How is the PSD the Fourier Transform of the Autocorrelation function? I am getting very confused with the textbook I am reading through: Modern Digital and Analogue Communication Systems:
3.8.1 Parseval's Theorem says that:
The total power... | {
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"tags": "discrete-signals, power-spectral-density, autocorrelation, signal-power",
"url": nul... |
c#, .net
}
Now, my answer:
For me, usage of Contains is okay. It says exactly what you intend to check. In case you are curious, underneath it actually calls (in your case) randomizedString.IndexOf(userCharacter, StringComparison.Ordinal) >=0 which is a search within an array.
Additionally, I think you should change... | {
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"tags": "c#, .net",
"url": null
} |
c#
Summarizing
public class Rectangle
{
public readonly int Left;
public readonly int Right;
public readonly int Top;
public readonly int Bottom;
public Rectangle(int left, int right, int top, int bottom)
{
Left = left;
Right = right;
Top = top;
Bottom = bottom;... | {
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"tags": "c#",
"url": null
} |
for any modelling effort. 2 : Linear analysis of nonlinear pendulum : Mechanical systems model for a pendulum. Polking of Rice University. Linearization and local stability. Linear and Nonlinear Systems of Differential Equations. Consider the following phase portraits of two two-dimensional linear dynamic sys-tem What ... | {
"domain": "ritornoallalira.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9895109084307416,
"lm_q1q2_score": 0.8089988626481601,
"lm_q2_score": 0.8175744761936437,
"openwebmath_perplexity": 885.0737171511557,
"openwebmath_score": 0.5592595338821411,
... |
c#, performance, linq, hash-map
if (cati && en)
... add c to CatiControlStrings;
if (web && en)
... add c to WebControlStrings;
... and the same for Spanish.
}
Also your Count() statement may be expensive and unnecessary.
You're calculating IndexOf twice for every string.
And you're creating... | {
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"openwebmath_score": null,
"tags": "c#, performance, linq, hash-map",
"url": null
} |
javascript, beginner, html, event-handling, firebase
return "$"+input[0].toString()+".0"+input[1].toString();
} else {
return "$"+input[0].toString()+"."+input[1].toString();
}
}
}
var deformat = function(string) {
let dollars = string.match(/\$\d+/g)[0].substring(1);
let cents = string.match(/\.\d... | {
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"openwebmath_score": null,
"tags": "javascript, beginner, html, event-handling, firebase",
"url": null
} |
ros, ros-kinetic, baxter, boost, qt4
Originally posted by majedz on ROS Answers with karma: 11 on 2017-04-28
Post score: 1
Original comments
Comment by spooner-dev on 2017-04-28:
Check this question for suggestions @stackoverflow
Comment by imcmahon on 2017-04-28:
The kinetic-devel branch is not the default branch. M... | {
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"tags": "ros, ros-kinetic, baxter, boost, qt4",
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} |
c#, performance, unit-testing, interview-questions
for (int i = 0; i < givenArray.Length; i++)
{
if (!nonDuplicateContainer.Add(givenArray[i])) {
duplicate = givenArray[i];
break;
}
}
return duplicate;
}
Test:
/// <summary>
/// Testing with the correct duplicated ... | {
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"openwebmath_score": null,
"tags": "c#, performance, unit-testing, interview-questions",
"url": null
} |
php, mysql, sql-injection
$result = mysql_db_query($dbname, $query1) or die("Failed Query of " . $query1);
$thisrow=mysql_fetch_row($result);
if ($thisrow) {
echo "The Product was found.";
}
else
{
echo "The Product was not found.";
} On demand -> issues mentioned in comments, reviewed & posted as an answer:
The a... | {
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"openwebmath_score": null,
"tags": "php, mysql, sql-injection",
"url": null
} |
algorithms, reference-request, books
Title: Which textbook can I use after a high school CS course? I just finished the AP Computer Science course in high school and since my school does not have any further classes, I was thinking about getting a textbook and continuing my study. APCS goes through Big O, Arrays + Arr... | {
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"openwebmath_score": null,
"tags": "algorithms, reference-request, books",
"url": null
} |
c++, linked-list, pointers
Title: Avoiding pointers in this C++ linked list As I know it is not good idea to have so many pointers in c++ code.
But I have written this simple implementation of linked list in c++ and there are many pointers in it, how can I improve that?
Also as I tried I can not use functions in algor... | {
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"tags": "c++, linked-list, pointers",
"url": null
} |
ros, android-core, gradle, android
building an application, then be forewarned that your application
will still fail to build or run, at some point. Please be
prepared for angry customers who find, for example, that your
application ceases to function once they upgrade their operating
system. You will be to blame for ... | {
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"tags": "ros, android-core, gradle, android",
"url": null
} |
c++, performance, algorithm, signal-processing, complex-numbers
// The N/2-point complex DFT uses only the even twiddle factors
if (k % 2 == 0)
{
W_p[k / 2] = W[k];
}
}
On my PC that reduces the time from hovering around 1.95 million µs to around 1.85 million µs, not a huge difference but easily m... | {
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"tags": "c++, performance, algorithm, signal-processing, complex-numbers",
"url": null... |
spike is an imaginary (sine) weight. The 3-D Fractional Fourier Transformation (FrFT) has unique applicability to multi-pass and multiple receiverSynthetic Aperture Radar (SAR) scenarios which can collect radar returns to create volumetric reflectivity data. Note that this is similar to the definition of the FFT given ... | {
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"id": null,
"lm_label": "1. Yes\n2. Yes",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.981735721648143,
"lm_q1q2_score": 0.8678929482289481,
"lm_q2_score": 0.8840392878563336,
"openwebmath_perplexity": 1078.9064028815767,
"openwebmath_score": 0.8407778143882751,
"... |
c++, reinventing-the-wheel, c++14, collections, circular-list
using iterator = my_iterator<false>;
using const_iterator = my_iterator<true>;
iterator begin();
const_iterator begin() const;
const_iterator cbegin() const;
iterator rbegin();
const_iterator rbegin() const;
iterator end();
c... | {
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"openwebmath_score": null,
"tags": "c++, reinventing-the-wheel, c++14, collections, circular-list",
"url": null
} |
he is not changing his position with respect to other passengers or objects on the bus. Projectile motion is the motion of an object thrown or projected into the air, subject to only the acceleration of gravity. The translational speed of the ball is 3.50 m/s at the bottom of the rise. A projectile that is not launched... | {
"domain": "zoldterv.hu",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9752018419665618,
"lm_q1q2_score": 0.8062108622714075,
"lm_q2_score": 0.8267117919359419,
"openwebmath_perplexity": 788.8755055509969,
"openwebmath_score": 0.38295450806617737,
"tags... |
c#, api, rest, wrapper
_restClient.BaseUrl = new Uri(BaseUrl);
_restClient.AddDefaultHeader("Accept-Tenant", AcceptTenant);
_restClient.AddDefaultHeader("Accept-Language", AcceptLanguage);
}
public IRestRequest GetRequest(string url)
{
return new RestRequest(url, Method.GET);
}... | {
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"tags": "c#, api, rest, wrapper",
"url": null
} |
units, si-units, absolute-units
It's a typical pattern that the nominal value is a rounded version of the actual value, but this is not always a great rule to follow. I've had the most confusion with nominal vs. actual values when it comes to different types of pipe fitting such as SwageLok. In this case it seems like... | {
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"tags": "units, si-units, absolute-units",
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} |
ros
You'll have to come up with a way to wire your FPGA to your ROS computer. Serial, USB and Ethernet may all be choices here.
You'll need to find or write a protocol that defines how the FPGA communicates with the computer. This could be a simple serial protocol, or it could be UDP over Ethernet, or something else.
... | {
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If two $n$ by $n$ matrices, $A$ and $B$ have the same $n$ linearly independent eigenvectors, corresponding to the same eigenvalues, then the matrix of eigenvectors, $U$, can be used to diagonalise both matrices $$U^{-1}AU= U^{-1}BU=D$$ where $D$ is the matrix of eigenvalues. So, in this case, $A=B$ as you suspected.
I... | {
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"lm_q2_score": 0.837619961306541,
"openwebmath_perplexity": 162.4025575349257,
"openwebmath_score": 0.954697847366333,
"tags"... |
php, object-oriented, authentication, session
/**
*
*/
public function set_session($user_data)
{
if ($user_data)
{
$this->session = $user_data;
}
}
/**
*
*/
public function unset_session()
{
if (isset($this->session))
{
... | {
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"tags": "php, object-oriented, authentication, session",
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The logarithmic norm can also be expressed in terms of the matrix exponential.
Lemma 1. For $A\in\mathbb{C}^{n\times n}$,
$\notag \mu(A) = \displaystyle\lim_{\epsilon\to 0+} \frac{\log\, \| \mathrm{e}^{\epsilon A}\|} {\epsilon} = \lim_{\epsilon\to 0+} \frac{\| \mathrm{e}^{\epsilon A}\| - 1} {\epsilon}.$
## Propertie... | {
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"lm_q2_score": 0.8128673155708975,
"openwebmath_perplexity": 476.1456446145442,
"openwebmath_score": 0.9996046423912048,
"tags": nul... |
type-theory, dependent-type, homotopy-type-theory
I assume the other types could also be constructed similar to how they are in pure CC, (ie just derive the type from the inductive part of the definition).
Many of these types are explicitly made redundant by the Inductive/W types that are introduced in chapters 5 and ... | {
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"openwebmath_score": null,
"tags": "type-theory, dependent-type, homotopy-type-theory",
"url": null
} |
gan
Title: Where is the VGG in Cartoongan? When I read through the paper of Cartoongan [CartoonGAN: Generative Adversarial Networks for Photo Cartoonization], I was so confused about where is vgg located in the entire network.
Based on the paper about GAN [Generative Adversarial Nets], I could not see anywhere that vg... | {
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"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "gan",
"url": null
} |
beginner, go, rest, url-routing
import "net/http"
func Comments(r *http.Request) string {
return "Comments"
} There's not so much code that it would be hard to read, looks clean enough to me.
Regarding scalable ... in what way? The switch in Handler will be the limiting factor since adding another route will alw... | {
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"openwebmath_score": null,
"tags": "beginner, go, rest, url-routing",
"url": null
} |
3d Parametric Grapher | {
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"lm_q2_score": 0.8397339736884711,
"openwebmath_perplexity": 1545.129168880018,
"openwebmath_score": 0.4409862756729... |
network-flow, minimum-cuts
There can be multiple min-cuts, all with the same cost. They form a lattice structure: the intersection of two min-cuts is another min-cut, and the union of two min-cuts is another min-cut. You can identify a "smallest" element in this lattice by taking the intersection of all min-cuts; th... | {
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##### Theorem BIS Bases have Identical Sizes
Suppose that $V$ is a vector space with a finite basis $B$ and a second basis $C$. Then $B$ and $C$ have the same size.
Theorem BIS tells us that if we find one finite basis in a vector space, then they all have the same size. This (finally) makes Definition D unambiguous.... | {
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"tags": null,
... |
is essentially the Divergence Test; therefore, it established the divergence in this case. 05) was used to test the similarity of species richness of wild edible plants reported by Kara and Kwego people; Pearson's Chi-square test (α = 0. Wolfram|Alpha Widget: Infinite Series Calculator. Test for convergence Check: Is t... | {
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"lm_q2_score": 0.837619961306541,
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"openwebmath_score": 0.7435677647590637,
"tag... |
c++, formatting, c++14, template, variadic
using namespace printing_shortcuts;
} // namespace gupta
using namespace gupta::printing_shortcuts;
class test {};
std::string to_string(const test &) { return "test"; }
#include <assert.h>
int main() {
using namespace gupta;
assert(format("const CharT *str") == "con... | {
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c, game, error-handling, memory-management
Note that I'm only allowed to use the C99 standard.
common.h
#ifndef COMMON_H
#define COMMON_H
#include <stdio.h>
typedef enum error_code {
OK = 0,
COULD_NOT_OPEN_FILE = 1,
COULD_NOT_READ_FILE = 2,
INVALID_OPTIONS = 3,
ALLOC_FAILED = 4
} t_error_code;
t... | {
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rqt
Originally posted by 130s with karma: 10937 on 2014-07-06
This answer was ACCEPTED on the original site
Post score: 1 | {
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javascript, ajax
// Add an abort to the cancel object.
cancel.abort = () => { abort = true };
// Abort or proceed?
return abort ? Promise.reject('aborted') : fetch(options.url).then(response => {
// Reject because of abort
return abort ? Promise.reject('aborted')
// Response is good
: r... | {
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"tags": "javascript, ajax",
"url": null
} |
homework-and-exercises, special-relativity
It works like that: person flashes a flash and when light reaches certain clock, adjusts this clock, assuming that one - way speed of light is c in all directions.
However, there are others self - consistent synchronizations. Einstein synchronization is a special case of Reic... | {
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stim
A hacky way that you can almost do this, specifically for the case of two observables, is to use one of the observables as a discard signal. E.g. add --postselected_observables_predicate "index == 1" to the sinter collect call on the command line. Then you get P(mispredictobs1) from the number of discards and P(m... | {
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"openwebmath_score": null,
"tags": "stim",
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} |
machine-learning, r, scikit-learn, sql, association-rules
End output would be
table 1 (first_name, middle_name, lastname) are the best join against
table 2 (fname, mname, lname) What you're trying to do is called "entity resolution" or "record linkage" (you can do a more thorough search in google). A typical approach ... | {
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This question gives two theorems, but both have assumptions about the existence of limits. This one comes a little closer, but still isn't entirely satisfactory.
I'd love any nice-enough condition to be broadly useful. In particular, I think it's completely reasonable to require, for instance, that the "substitution f... | {
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c#, entity-framework
Man - auto-generated class by entity framework.
Location - auto-generated class by entity framework. I plan to implement this class in my CRUD functions as soon as I can get working clean logic for the CRUD functions that handle the Man class. And hopefully Man & Location can share the same CRUD ... | {
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computability, terminology
Given a real number $x \in [0,1]$, output either $0$ or $1$. If $x < 0.501$, then $0$ is an acceptable solution and if $x > 0.499$, then $1$ is an acceptable solution.
If the input to the task above is from $[0.499,0.501]$, then the answer we get does not only depend on the real we are looki... | {
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python, tree, python-2.x
def distance(pointA, pointB):
"""distance(pointA, pointB)
Calculates the distance between two points and returns a tuple of
(dx, dy, r); where r is the radial separation, dx and dy are the axial
separation.
"""
ax, ay = pointA
bx, by = pointB
dx, dy = ax - bx, ... | {
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The inequality marked with $(*)$ can be checked by (four way) case distinction over whether $n_L,n_R\in 2\mathbb{N}$. By the power of induction, this concludes the proof.
As an exercise, you can use the same technique to prove the following statements:
• Every perfect binary tree of height $h$ has $2^h-1$ nodes.
• Ev... | {
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• Great! I had just to find an upper bound smaller than one! – Alessandro Oct 13 '18 at 18:59
hint
Let $$x,y\in [0,+\infty)$$.
By MVT
$$f(x)-f(y)=(x-y)f'(c)$$
where $$0\le x
$$f'(c)=\frac{1}{2\sqrt{c+2}}\le \frac{1}{2\sqrt{2}}$$
• Thanks! Basically to show that $f$ is a contraction it is enough to show that $\mi... | {
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"openwebmath_score": 0.9999661445617676,
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everyday-life
I have an argument to support my answer: If you use a cheap and rough chalk, this phenomenon doesn't take place because there are not enough upward forces in the chalk particles due to the powdery and rough nature of the chalk. | {
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triangle like its definition, properties, the formula of its perimeter and area along with some solved examples. Perimeter: Semiperimeter: Area: Area: Base: Height: Angle Bisector of side a: Angle Bisector of side b: An obtuse-angled triangle is a triangle in which one of the interior angles measures more than 90° degr... | {
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"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9817357184418847,
"lm_q1q2_score": 0.8920226432271715,
"lm_q2_score": 0.9086178963141964,
"openwebmath_perplexity": 816.1558441323414,
"openwebmath_score": 0.5550912618637085,
"... |
# Solving the equation $(x^2-7x+11)^{(x^2-13x+42)} = 1$
I have the following equation. $$(x^2-7x+11)^{(x^2-13x+42)} = 1$$ The question is to find the number of positive integer values possible for $$x$$. The answer is $$6$$. But I am only able to find $$4 ( 2,5,6,7)$$. What are the other two possible values?
• $x=3,4... | {
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"openwebmath_score": 0.8653993010520935,
"ta... |
The second problem is a little more serious. Your explanation that \phi(n) approaches infinity is wrong. It’s true that for any given N, there is a largest n such that \phi(n)=N, but that doesn’t mean that the n’s go to infinity. It actually doesn’t even mean that the n’s are increasing everywhere, but even if you coul... | {
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"lm_q1_score": 0.9905874123575265,
"lm_q1q2_score": 0.8028502049100867,
"lm_q2_score": 0.8104789086703225,
"openwebmath_perplexity": 122.45264547329877,
"openwebmath_score": 0.9632298350334167,
"tags":... |
ros, homebrew, mavericks, osx
bondcpp or who ever is originally finding uuid is either not passing along the library directory or not converting the relative library (-L/usr/local/Cellar/uuid/1.6.2/lib -luuid) into an absolute library (maybe /usr/local/Cellar/uuid/1.6.2/lib/libuuid.dylib).
Please file an issue against... | {
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} |
gazebo, simulation, ros2
Thirdly, I'd try slam_toolbox rather than cartographer (for debugging, you're welcome to move back to it later) to see if the changing of SLAM vendors makes it work. Basically, my advice boils down to start with something we know works (like the tutorial) and change 1 thing at a time until it ... | {
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} |
crystallography, miller-indices
The magnitude of vector $\Delta \mathbf{k}$, from Figure 2.24, is then given as:
$$|\Delta \mathbf{k}| = 2\mathbf{k}\sin(\theta)$$
We now derive the relation between the reflecting planes to which $\Delta \mathbf{k}$ is normal and the lattice planes with a spacing $d_{hkl}$ (see Figure ... | {
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"tags": "crystallography, miller-indices",
"url": null
} |
physical-chemistry, stoichiometry
Consuming all the $\ce{NH3}$ we would get $18.75$ moles of $\ce{(NH2)2CO}$
Consuming all the $\ce{CO2}$ we would get $26$ moles of $\ce{(NH2)2CO}$
The limiting reagent is $\ce{NH3}$, so the most we will get of
$\ce{(NH2)2CO}$ is $18.75$ moles. Now convert that to grams, we get
$1... | {
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particle-physics, feynman-diagrams, weak-interaction
if you take time to be the Y axis, this is a feynman diagram of e+e- annihilation into two photons. Charge conservation means that in time , charge is conserved. Thus e+ and e- add to zero charge, and when they interact the charge leaving the region should be zero.... | {
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• @JosephO'Rourke In lieu of that, two fun facts I think I can prove: 1. This sequence, when extended backwards in time, is symmetric about the $(x,y)$ axis 2. every other path is closed. – Will Sawin Dec 29 '16 at 7:24
• @JosephO'Rourke 1. This is easy to check from the fact that the backwards evolution rule is the fo... | {
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condensed-matter, research-level, topological-field-theory, topological-order, topological-phase
This paper does not discuss stochastic evolution/transformation. So indeed their caption is not strictly true for every (cat state) ground state, but perhaps they were thinking of taking the symmetry-broken ground state---... | {
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harmonic-oscillator, oscillators, resonance, vibrations, coupled-oscillators
Even a brief strike, like a mallet blow, has a time behavior, and resembles either a square, sawtooth, or triangle pulse, can be viewed as a pulse of multiple frequencies. It need not be a multiple period train. A single pulse induces the for... | {
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"... |
Total = Group1 + Group2 + Group3 - (sum of 2-group overlaps) - 2*(all three) + None
Then, all we need to do is plug in the numbers we are given (converting percents to numbers) and solve for the sum of 2-group overlaps, because that is what the question is asking us for.
Please let me know if you have any questions, ... | {
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"openwebmath_score": 0.6514236927032471,
"tags": n... |
fft, ifft, signal-synthesis
Which gives me the a value for $\textrm{bin}_2$. (I’m assuming this should be the absolute value)
To calculate bin 3, I take the radian value of $\textrm{bin}_1$ and subtract PI from it-1.40053767731463 = (bin1 radian value) 1.74105497627516 - PI
Process it through the sinc function0.7036... | {
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"tags": "fft, ifft, signal-synthesis",
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} |
java, beginner, role-playing-game
} else if(level == 8 && curXP == requiredXP[7]) {
System.out.println(" #############################");
System.out.println(" # You have reached level " + level + "! # ");
System.out.println(" #############################");
} else if(level == 9 && curXP ==... | {
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plot(n,abs.(err),m=:o,label="results",
xaxis=(:log10,L"n"),yaxis=(:log10,"error"),
title="Convergence of trapezoidal integration")
# Add line for perfect 2nd order.
plot!(n,3e-3*(n/n[1]).^(-2),l=:dash,label=L"O(n^{-2})")
## Extrapolation¶
If evaluations of $$f$$ are computationally expensive, we want to get as much... | {
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"openwebmath_score": 0.8504312634468079,
"... |
Veritas Prep Reviews
Manager
Status: On...
Joined: 16 Jan 2011
Posts: 189
Followers: 3
Kudos [?]: 42 [5] , given: 62
Re: Inequalities trick [#permalink] 10 Aug 2011, 16:01
5
KUDOS
5
This post was
BOOKMARKED
WoW - This is a cool thread with so many thing on inequalities....I have compiled it together with some of my... | {
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"lm_q2_score": 0.8887587920192298,
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"openwebmath_score": 0.6233364343643188,
"tags": ... |
graph-theory, lo.logic, finite-model-theory
Title: Is graph connectivity definable in existential MSO with vertices and edges?
Can $\exists$MSO$_2$ express graph connectivity? | {
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ros
Title: Will there be official hydro support for Ubuntu 13.10 soon?
... Now that 13.04 is not provided with updates anymore. Or should one go back to 12.04LTS?
Originally posted by karlelch on ROS Answers with karma: 11 on 2014-02-02
Post score: 1
Original comments
Comment by gustavo.velascoh on 2014-02-02:
This... | {
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"tags": "ros",
"url": null
} |
ros, linux, windows, win-ros
Title: Win_ros fuerte broadcasting messages to linux machine
Hi,
I just installed win_ros fuerte. I have been running electric on windows without any problems. A linux box acts as the Master and the windows machine broadcasts messages to the linux box. However, with win_ros fuerte I am... | {
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"tags": "ros, linux, windows, win-ros",
"url": null
} |
black-hole, gravitational-waves, neutron-star, formation, mass-gap
and later says:
"This is going to change how scientists talk about neutron stars and black holes," said co-author Patrick Brady, a professor at the University of Wisconsin, Milwaukee, and the LIGO Scientific Collaboration spokesperson. "The mass gap m... | {
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"id": 7062,
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"tags": "black-hole, gravitational-waves, neutron-star, formation, mass-gap",
"url": nul... |
From the fact that $|x|=\pm x$ depending on the sign of $x$, you can infer that the given function is continuous and piecewise linear.
A linear function has no critical points and achieves its minimum/maximum value at the endpoints of its definition domain.
We have $f(-\infty)=\infty,f(1)=3,f(2)=2,f(3)=3,f(\infty)=\i... | {
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"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9790357573468176,
"lm_q1q2_score": 0.8071777107164056,
"lm_q2_score": 0.8244619306896956,
"openwebmath_perplexity": 230.38172696594552,
"openwebmath_score": 0.8116179704666138,
"ta... |
machine-learning, decision-trees, hyper-parameters, random-forests
Bayesian Optimization You can treat the hyperparameter settings and corresponding score as a black box function and use exploitation-exploration paradigm using bayesian optimization. | {
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"url": null
} |
As a common mean, we choose
$$\mu_1 = \dots = \mu_n = \frac{a+b}{2n}.$$
In order that $Z\in[a,b]$ with probability $p$, its standard deviation should fulfill
$$\sigma_Z = \frac{b-a}{q_\alpha},$$
where $q_\alpha$ is the standard normal quantile to the level $\alpha$, here $\alpha=1-\frac{1-p}{2}$.
We now need to sp... | {
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"lm_q1_score": 0.9811668690081643,
"lm_q1q2_score": 0.8089347205714964,
"lm_q2_score": 0.8244619199068831,
"openwebmath_perplexity": 505.47963152124345,
"openwebmath_score": 0.7492968440055847,
"ta... |
python, numerical-methods, scipy, sympy
# for each piece of the function:
for i, func_str in enumerate(infunc_str_list):
# find number of parameters and create those SymPy objects
nparams = func_str.count('a')
a = symbols('a0:%d' % nparams)
t = symbols('t') # transition height
... | {
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"tags": "python, numerical-methods, scipy, sympy",
"url": null
} |
machine-learning, deep-learning, datasets, prediction, training-datasets
Processing that included unstructured data such as text articles, images and videos is harder, but not impossible. The trick would be to reduce this data down into simpler numerical format - e.g. you could use a language model to extract sentimen... | {
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"tags": "machine-learning, deep-learning, datasets, prediction, training-datasets",
"url": null... |
a refresher on factoring quadratic equations, please visit this page. Each factor is a difference of squares! quadratic trinomial, independent term, coefficient, linear factor Simplify: ⓐ ⓑ If you missed this problem, review . Here is the form of a quadratic trinomial with argument x: ax 2 + bx + c. The argument is wha... | {
"domain": "descarga.nu",
"id": null,
"lm_label": "1. Yes\n2. Yes",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9658995742876885,
"lm_q1q2_score": 0.8569505494598672,
"lm_q2_score": 0.8872046041554923,
"openwebmath_perplexity": 731.534725235518,
"openwebmath_score": 0.6123183965682983,
"tags": nul... |
forces
Title: Newton's Third Law Question Hypothetically, consider a scenario in which a man was exerting X amount of Newtons on a truck that is sitting in neutral on a hill, causing it to remain almost at rest. However, in seconds, the truck begins to slide down the hill. In this example, did the truck exert more, le... | {
"domain": "physics.stackexchange",
"id": 36135,
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"lm_q2_score": null,
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"openwebmath_score": null,
"tags": "forces",
"url": null
} |
rviz, urdf, nxt, collada
Title: Is it possible to create additional Collada meshes of LEGO NXT parts?
I have built a robotic arm in Lego Digital Designer (as well as the physical world), and run the resulting .lxf and .ldr files through the nxt_lxf2urdf package. I then roslaunch the robot and up come the motor/sensor... | {
"domain": "robotics.stackexchange",
"id": 6506,
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"tags": "rviz, urdf, nxt, collada",
"url": null
} |
newtonian-mechanics, momentum, conservation-laws, collision
Solution: Let the required speed be $V$.
As there is a sudden change in the speed of the block, the tension must change by a large amount during the collision.
Let $N$ = magnitude of the contact force between the particle and the pan
$$T = \text{tension in ... | {
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"tags": "newtonian-mechanics, momentum, conservation-laws, collision",
"url": null
} |
quantum-mechanics, condensed-matter, potential, density-functional-theory
Which principle/definition does equation $(1)$ derive from? Is this some functional derivative magic?
Could it be that the authors mean the partial derivative of some kind instead, i.e.
$$
V_{xc} = \frac{\partial}{\partial n} n\cdot\big(\varep... | {
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"url... |
where the formula for the binomial series was used.
$f\left(-\frac1{16}\right)$ evaluates to $72-32\sqrt{5}$, and replacing the series with this value and simplifying finally yields $\phi$.
• (If there are simpler solutions, I'd like to see them!) Oct 8, 2015 at 10:07
• Hi @J.M is back. You could identify your first ... | {
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"lm_q2_score": 0.8128673110375458,
"openwebmath_perplexity": 874.0591706468871,
"openwebmath_score": 0.9925158619880676,
"tag... |
human-genetics, genetics, pigmentation, hair
EDIT: To summarize, it's very complex. This paper performed genome-wide association scans looking at two comparisons each for eyes (Blue and green, blue and brown), hair (red or not, blond or brown), and skin (freckles, sun-sensitivity). The researchers looked in a group ... | {
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"lm_q2_score": null,
"openwebmath_perplexity": null,
"openwebmath_score": null,
"tags": "human-genetics, genetics, pigmentation, hair",
"url": null
} |
quantum-information, computational-physics, quantum-computer, computer
Title: Are quantum computers able to simulate every physical process that a classical one can simulate? I edited the question since this comment was (rightly) made:
There are few things that are more annoying than questions where the question text... | {
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"tags": "quantum-information, computational-physics, quantum-computer, computer",
"url": ... |
There can be many reasons for why something like that might be ignored. Assuming it isn't a simple mistake, it might just be that, over the domain of integration, the value of the expression in the absolute value is always positive (or negative, for that matter), and so there is no need to break the integral up. An exa... | {
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"lm_q1_score": 0.9597620550745211,
"lm_q1q2_score": 0.8138472747301649,
"lm_q2_score": 0.8479677545357568,
"openwebmath_perplexity": 170.29412232167107,
"openwebmath_score": 0.9601995944976807,
"ta... |
College Board, which has not reviewed this resource. hence, the critical points of f(x) are (−2,−16), (0,0), and (2,−16). Now let me ask you a question. The most important property of critical points is that they are related to the maximums and minimums of a function. and lower and lower as x becomes more and more A fu... | {
"domain": "british-hydro.org",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9773707966712549,
"lm_q1q2_score": 0.826799439584339,
"lm_q2_score": 0.8459424431344437,
"openwebmath_perplexity": 351.80045437290323,
"openwebmath_score": 0.6818031072616577,
... |
collada
Title: Collada to URDF Conversion
Hello everyone,
I want to load a collada file with kinematics and joints of a robot into V-Rep, which only supports URDF for kinematics.
I found the collada_parser which seems to be able to convert a collada file to URDF, but I have no idea how to convert or use it. Is it eve... | {
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"id": 17893,
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"tags": "collada",
"url": null
} |
c++, opengl
}
void Render(Mesh& mesh){
m_shader.Bind();
mesh.Draw();
m_shader.UnBind();
}
glm::mat4 GetProjectionViewMatrix(){
return m_projectionView;
}
void SetProjectionViewMatrix(glm::mat4 projectionView){
this->m_projectionView = projectionView;
... | {
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"tags": "c++, opengl",
"url": null
} |
rna-seq, ngs
ERCC spike ins can help you reduce technical noise, but I am not familiar with the Chromium protocol so maybe it doesn't apply there (?) | {
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"id": 90,
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"tags": "rna-seq, ngs",
"url": null
} |
byfopj2uwp44, 7cfyvrfp8w9, jeswfqwyjo9o, puiheu7yot3fq, psjt015opmix, bu7of43i13nzsez, o8snp5amj6u, q3o3kdtqkd6, w18xc7obh34, okz55ki5nnmox, qgheo4zsou4sr, rfbwwou2ul, itjg2fm9nkgrdk, k1gs292nerq2mqo, djhj6mo53iko8zz, m3giv5cni72iaj, f8u62c30f2ajtgv, 824a5dj65fuhh, 59cvimvwxme4, t8j1qf2siw, b22u3v15018s5z, o98h7cz8pw, ... | {
"domain": "salesianipinerolo.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9850429116504951,
"lm_q1q2_score": 0.8250915995526686,
"lm_q2_score": 0.8376199552262967,
"openwebmath_perplexity": 1644.3225169787613,
"openwebmath_score": 0.6696335077285767,
... |
c#, regex
Title: RegEx , match first character condition, then another condition after that? I have been struggling with a RegEx pattern for a while now.
I am trying to match a single Text character at the start of a string and then anything after that character that is an integer with a length of 5 characters.
Ie,
... | {
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"openwebmath_score": null,
"tags": "c#, regex",
"url": null
} |
A marble is drawn at random from the jar. When picking, you'll first randomly pick a jar, and then randomly pick a marble out of that jar. Use the spinner at the right to find each. The mean of the Exponential(λ. theoretical probability: what is the probability of drawing two purple marbles? Definition. Feel free to jo... | {
"domain": "mirtillhouse.it",
"id": null,
"lm_label": "1. YES\n2. YES",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9805806512500486,
"lm_q1q2_score": 0.8128413523663707,
"lm_q2_score": 0.8289388040954683,
"openwebmath_perplexity": 667.2365926197297,
"openwebmath_score": 0.6545421481132507,
"tags"... |
matlab, fft, discrete-signals, signal-analysis, python
Title: Most accurate way to find RMS of signals fundamental I would like to know which algorithmn is the most accurate one in order to calculate the fundamental RMS of two signals (f. e. voltage and current). Is it the standard FFT approach with a rectangular wind... | {
"domain": "dsp.stackexchange",
"id": 5106,
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"tags": "matlab, fft, discrete-signals, signal-analysis, python",
"url": null
} |
coin is flipped. Problem: simulate a biased coin using a fair coin. , P(HHHHHHHHHH))? Probability of getting a head on each flip of the coin is the same = 0. Probability Problems Involving Coins. The number of possible outcomes gets greater with the increased number of coins. For the first coin toss, the odds of landin... | {
"domain": "luviaheventi.it",
"id": null,
"lm_label": "1. YES\n2. YES\n\n",
"lm_name": "Qwen/Qwen-72B",
"lm_q1_score": 0.9787126488274565,
"lm_q1q2_score": 0.827934559772497,
"lm_q2_score": 0.8459424334245617,
"openwebmath_perplexity": 369.53134766360745,
"openwebmath_score": 0.7722846269607544,
"t... |
| Specifies the kind of interpolation as a string
| ('linear', 'nearest', 'zero', 'slinear', 'quadratic', 'cubic',
| 'previous', 'next', where 'zero', 'slinear', 'quadratic' and 'cubic'
| refer to a spline interpolation of zeroth, first, second or third
| order; 'previous' and 'next' simply ret... | {
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"lm_q1_score": 0.9766692345869641,
"lm_q1q2_score": 0.871004407633608,
"lm_q2_score": 0.8918110418436166,
"openwebmath_perplexity": 5873.488914877258,
"openwebmath_score": 0.488471657037735,
"tags": null... |
c, linked-list, file, homework
if(found_car == 0){
puts("Car not found");
return;
}
struct car other_cars;
rewind(binary_file);
for(int i = 0; i < temp.n_owners; ++i){
while((fread(&other_cars, sizeof(other_cars), 1, binary_file)) != 0){
if(other_cars.car_ID == del... | {
"domain": "codereview.stackexchange",
"id": 25892,
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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": "c, linked-list, file, homework",
"url": null
} |
eigen, ros-electric
[rosmake-1] Starting >>> roscpp [ make ]
[rosmake-1] Finished <<< roscpp ROS_NOBUILD in package roscpp ... | {
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"tags": "eigen, ros-electric",
"url": null
} |
Here's how I would do it. I'd convert everything to a single, standard set of units as recommended in the comments, and also stick to one digit before the decimal in scientific notation:
$$T^2=\frac{4\pi^2r^3}{G\cdot M_{Sun}}$$
Using all numbers in the same units:
$$r \ 4.5 \times 10^{11} \ (m)$$
$$G = 6.674 \times... | {
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"lm_q1_score": 0.9603611586300241,
"lm_q1q2_score": 0.8084566577700208,
"lm_q2_score": 0.8418256512199033,
"openwebmath_perplexity": 562.9479756003678,
"openwebmath_score": 0.9342266917228699,
"tag... |
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