Extracting analemma from series of sunset photos
When do we need the Update[] function?
System of differential equations with overdetermined boundary conditions
Region with Sign in its definition kills the kernel
How to convert PDE into ODE?
Problem with IncludePoints in ToElement Mesh
Why won't Wolfram Engine perform this integration?
Extracting analemma from series of sunset photos https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318744
This is a recreational question. I would value better approaches. Aim I found the following image on substack. I wondered whether it would be possible to show the analemma from these images. I don't ... [image-processing] [image]
asked by ubpdqn https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1997
Score of 17 answered by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172
Score of 12 When do we need the Update[] function? https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318748
Probably a hard question, but I think it's better to have a separate post for it. For now, no one has found a general rule determining when Update is necessary ... [evaluation] [core-language]
asked by xzczd https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1871
Score of 12 answered by Michael E2 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4999
Score of 8 System of differential equations with overdetermined boundary conditions
https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318747
I am trying to verify the results in the paper Self-dual Chern-Simons solitons by R. Jackiw, Kimyeong Lee and Erick J. Weinberg, where they arrive at the expressions $g'(r)=\frac{a(r)g(r)}{r}$ and $\... [differential-equations] [finite-element-method] [boundary-condition-at-infinity] [singularity] [paper-reproduction]
asked by MrClapton https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=116058
Score of 7 answered by xzczd https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=1871
Score of 9 Region with Sign in its definition kills the kernel https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318737
This works: ... [regions] [kernel] [crash]
asked by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172
Score of 7 answered by cvgmt https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=72111
Score of 5 How to convert PDE into ODE? https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318749
I have a function J(x,y) = J(y,x) which satisfies the following PDEs with $\theta_x = x \frac{\partial}{\partial x}$ and $\theta_x = y \frac{\partial}{\partial y}$ $(1+\theta_x) (1+\theta_x+\theta_y)(... [differential-equations] [calculus-and-analysis]
asked by Epsilon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=71940
Score of 3 answered by yarchik https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9469
Score of 4 Problem with IncludePoints in ToElement Mesh https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318738
In a finite element code I whish to use "IncludePoints" in ToElementMesh and I get a failure. Here is a minimum ... [finite-element-method] [mesh] [opencascade]
asked by Hugh https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=12558
Score of 3 answered by user21 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=18437
Score of 6 Why won't Wolfram Engine perform this integration? https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318764
I want to find the exact value of this definite integral in terms of c and q with the following assumptions: ... [calculus-and-analysis]
asked by Lawton https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=92961
Score of 2 answered by Nasser https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=70
Score of 7