All Questions

I want to draw the outline of a circle (it's actually the glyph period from Cascadia Code font): ...

The problem is the following: Thanks for the answer.

This question came up between me and my teacher when we discussed whether the following when lim x>a f(x) = o does lim x>a ln(1+f(x))/f(x) = 1 is true or not. It is widely known that lim x>0 ln(1+...

How to draw a surface with four space curves as boundaries of the surface? ...

i have been struggling to compute a particular instance of cylindrical 3D heat equation. Here is my code : ...

StreamPoints will give some specific lines, and I want to change their style by StreamStyle, but now it only will change the black part lines style, the StreamScale will change the red lines' style, ...

I want to solve a trogonometric problem by transforming it to polynomial : ...

Is it possible to easily simplify the difference of conjugate pairs? In particular, if there's just a single variable, then FullSimplify[a - Conjugate[a]] ...

V 12.1 on windows. This limit $\lim_{(x \rightarrow 0,y\rightarrow 0)} \frac{x^2-y^2}{x^2+y^2}$ depends on the direction. So the limit does not exist, or could be written as Maple does it, which is $...

Is there a method that can help Recognize function from its own plot For example : I was given the following plot and I was asked to find out what function/Signal that this plot belongs to

I am attempting to use RegionFunction to trim an implicit surface drawn with ContourPlot3D to only show the portion inside of a sphere (instead of the bounding box from PlotRange). However, when I ...

This code creates an 12x12 matrix with entries being complex functions of (kx,ky). Then asks to sort the eigenvalues and make Plot3D or ContourPlot of the lowest eigenvalue. The code was producing ...

Manipulate[ m = RandomPrime[d]; {m, d}, {d, {20, 50}, SetterBar} ] Basically, I expected the code to generate a random prime m (under the upper bound d) for me ...

I'm trying to take the determinant of an 11x11 matrix, constructed out of some functions I've defined ...

I was messing around in Mathematica and I ended up trying this out: GraphPlot3D[GraphData[{"MengerSponge", 3}]] which produced the following (you can see a video ...

I have a function defined as f[k_]:= Maximize[{(x^2/(1+x^2))((1-x^(2k))/(1+x^(2k+1)))^2, 0 <= x <= 1}, x] I would like to find an analytic form of $f$ as a ...

I'd like to use (if this already exists) or create a library to use Mathematica together with Kotlin (or Java) (not JLink, please see below). We already have this very useful implementation for ...

I have the following solution of the SDE: $$U(x,t)=-6+12 * \tanh \left[x+\left(B(t)-\frac{t^{2}}{2}\right)+\int_{0}^{t} e^{s^{2}} d s\right]^{2}$$ Where $B(t)$ is white noise. In the following code ...

The GetProcessMemoryInfo from psapi.dll is a helpful function that can be used to monitor the memory wolframkernel.exe used, where how much memory can be used and is actually used by wolframkernel is ...

Despite having looked over various posts concerning optimizing nested For loop expressions into a functional programming equivalent I still can not figure out how to actually to do this. Such ...

I want to integrate a function which seems to have no regularity problems. In fact I have defined ...

I have created a 3d region for Laplace's eqn ...

I downloaded Earth data from here. It is a GeoTiff file, which is a map of solar radiation falling on earth. Mathematica claims to import ...

Does anyone know whether Mathematica has a built-in function to import Esri ASCII raster format data as described at: http://resources.arcgis.com/en/help/main/10.2/index.html#/...

Here is my code. ...

Let us try to define 2D distribution through PDF: ...

Continuing the topic of my previous questions (link1 and link2), let me ask one more question. I have problems with the following code: ...

Edit I'll try to reformulate my problem to make it more clear. Consider association with elements of the form {x,y} -> {f(x,y),g(x,y),...}, where keys are ...

I'm developing a genetic algorithm to optimize some rather complex roof geometry but have run into some very strange behaviour that I haven't been able to narrow down the cause of for a week now. I'm ...

h[x_]:= 0.26 + 3.45 E^[-1/x] - 6.72 + 3x^3; (* Syntax: "E^" cannot be followed by "[-1/x]". *) What can I do to solve that? Thank you

I tried to plot roots of my equations with Plot, but because these graphs are not functions in some region Mathematica can not handle it. How can I sketch my ...

I would like to calculate the phase between two signals like f= Table[Sin[x-0.8],{x,-100,100,0.1}] g= Table[Sin[x],{x,-100,100,0.1}] For doing that I use the <...

If I have three points xi-1,xi, xi+1 where y(xi) =1 and y(xi-1)=0, y(xi+1)=0 (basis function) and I need to define a line that passes through these points I will use the line equation y-y1=(y2-y1) /(...

Is there a way to calculate the volume of these different regions without making the algebra ? ...

I use RegionIntersection to find the circle between 2 spheres, but Mathematica returns : ...

I have two sets of inputs that are to be fed to a simple function. The inputs are essentially a set of triangles and the normal for each triangle. The function will compute the gradient about the ...

I want substitute m for n in n = -3; While[True, If[2 n^2 + n - 6 == 0, Break[]]; n += 1/2];n...

What I am trying to do is to add an id column at the left side of my data set. This is the data set I am working with. I Have three columns and I want to add a new column on the left side with the ...

V 12.1 on windows. I am loading pkg2, which in its Private section loads pkg1 in order to call one of its function. After ...

I wanted (PlotStyles) HatchShading or StippleShading for figures that will be printed in black and white, but these options end up color by default. I tried combining with a GrayTones ColorFunction, ...

I'm trying to reproduce some plots from the analytical expression: $f(\xi)=\left(\frac{2}{\beta^2}-1\right)+\left(\frac{\theta\,e^{-\beta}}{2}-\frac{1}{2}\right)\xi+\sum_{n=1}^{60}\left[\frac{(-\beta)...

TL;DR How can I solve $\left(\vec{v}\cdot\nabla\right)\vec{v}=-g\hat{z}-\nabla p$ numerically for $p(r,\theta,z)$ given an explicit $\vec{v}(r,z)$ and $p(r_0,\theta,z)=g z$? Issue I have a PDE ...

Riemann zeta function $\zeta(s)$ is related to Riemann Xi function $\Xi(z)$ via: $$s=\frac12+ iz,\qquad \Xi(z):=\frac12s(s-1)\pi^{-s/2}\Gamma(s/2)\zeta(s),\tag{1}$$ We found the following function $\...

I'm doing a bit of string manipulation, and the output has Greek characters in it. I want to be able to copy and paste those Greek characters out of Mathematica and into another file. For example, ...

Investigating Function[] , I found: What is the difference between using a variable (in the case, $u$) and a "slot variable"? It seems anything can be done ...

How can I force Mathematica to use the identities satisfied by Jacobi polynomials $$ (1-\cdot)P_n^{(\alpha+1,\beta)} = \frac{2}{2n+\alpha+\beta+2}\left((n+\alpha+1)P_n^{(\alpha,\beta)}-(n+1)P_{n+1}^{(\...

Is $0\times\infty$ indeterminate or zero? Mathematica says the result is zero. Limit[0*n, n -> \[Infinity] ] or ...

Let's say I have a cylinder centered along the z-axis (center of cylinder is {0,0,0}) defined by its Radius R and half-length Z and an (infinite) line defined by two 3D points A and B which does not ...

Abstract: I have noticed something really tricky with Mathematica and the documentation for symbols is short on clearing the confusion. It likely reveals what symbols are but it's not very prominent. ...

I'm looking for a way to re-express a partition given in full form, like $\{{2, 2, 1, 1}\}$, into the shortened form $\{2^2, 1^2\}$, i.e. given a partition with repeated entries, count the number of ...