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I want to solve an underdetermined system of linear equations $A x = b$ with $A in mathbb{R}^{n times r^2}, x in mathbb{R}^{r^2}, b in mathbb{R}^n$. The matrix...
Asked on 12/04/2020 by nkyraf33
1 answerI am looking for tasks thatare unsuitable for GPUsgain significant speedup as more CPU nodes are addeddon't require large data transfer or inter-thread communication between nodes.Do any problems of this...
Asked on 12/03/2020
9 answerI have a system where $A$ is a large $ntimes n$ marix with fast MVMs. It may have many nonzero entries (albeit in a structured way so as to allow...
Asked on 12/03/2020 by VF1
1 answerI am trying to build a triangle mesh of the surface of a sphere which also includes a subdomain defined by a 'polygon'. Here is a successful example (subdomain defined...
Asked on 12/03/2020 by Fab von Bellingshausen
2 answerI apologize in advance if this post is at all ignorant or elementary, I am a pure mathematician who is newly getting into the world of scientific computing. For my...
Asked on 12/02/2020 by WBSS
1 answerI am trying to solve the non-linear parabolic PDE in $c(t,r)$$$c_t=frac{1}{r}(rDc_r-alpha r^2 c)_r$$with initial condition $c(0,r)=f(r)$and boundary conditions $c_r(t,r_1)=alpha r_1c_1/D$ and ...
Asked on 12/01/2020 by Woody20
0 answerMy background: I have taken some courses on numerical analysis during my PhD and read a few books on the topic as well. I mostly work on low Reynolds number...
Asked on 12/01/2020 by Debasish Das
2 answerhttps://stackoverflow.comKrylov solvers for iterative computation of the smallest singular value and the corrensponding singular vectors of a matrixEdit: This is a follow-up question to How to implement flexible...
Asked on 12/01/2020 by Luljeta Hoda
2 answerLooking for advice on discretization (preferably finite difference) schemes for pdes on curves in general, but in this case it is an ellipse (so given by $(acos(r), bsin(r)$). The...
Asked on 11/30/2020 by lrs417
0 answerSuppose I have to numerically simulate a process ${y_t}$ such that $y_tgeq0$ $forall tinmathbb{N}$, with $t$ denoting time-step. Let's suppose I use MonteCarlo with $mathscr{N}$...
Asked on 11/29/2020
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