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Top Questions

9 votes
2 answers
219 views
Efficiently estimating trace of a product of matrices
3 votes
2 answers
115 views
nnz-preserving sparse matrix multiplication
0 votes
2 answers
71 views
Where can I find matrices and it's preconditioner for testing?
4 votes
1 answer
116 views
Converting distance matrix back into original data
0 votes
1 answer
84 views
Mesh refinement in the Finite Element Method
6 votes
1 answer
100 views
Fast way of computing the action of a matrix power on a vector
4 votes
1 answer
98 views
Stochastic SIR using SDEint python package
2 votes
1 answer
86 views
LOBPCG bad preconditioned performance for largest eigenpairs
2 votes
1 answer
107 views
Total stored potential energy of finite element mesh from nodal point displacements and strain energy density function only
1 vote
1 answer
176 views
Solving Poisson equations as mixed Laplace using $RT_0-P_0$ pair
0 votes
1 answer
79 views
Is this a diffusion equation, or something else?
2 votes
1 answer
128 views
How to solve the following SDP with Python?
2 votes
1 answer
110 views
Index reduction of a DAE from a PDE system
3 votes
1 answer
85 views
What does this function called LAGRANGE2 do?
1 vote
1 answer
78 views
Memory issues with iterative solvers
5 votes
0 answers
111 views
Why are fast Givens rotations mentioned so little in the recent literature?
0 votes
0 answers
131 views
Solving huge dense square symmetric linear system
0 votes
1 answer
61 views
How to remove singularit​ies/discon​tinuities on 3D plots in Matlab?
2 votes
1 answer
69 views
High precision numerical integration of discrete data with Matlab
2 votes
2 answers
62 views
How to find fundamental matrix based on other fundamental matrix and camera movement?
1 vote
1 answer
61 views
How to Impose nonhomogeneous Neumann Boundary Condition in the DG Formulation
0 votes
1 answer
75 views
Can I use periodic boundary conditions for `U` but not for `p`?
7 votes
0 answers
93 views
Can we sparse solve a few eigenvalues specified by index range?
0 votes
1 answer
72 views
Solving ODE with Spectral Method using Chebyshev Polynomials
1 vote
1 answer
56 views
Converting a 4 rank matrix to 2 rank matrix after using tensorproduct
0 votes
0 answers
90 views
Is a 2021 MacBook Air sufficient for modeling and simulations research in fluid dynamics?
2 votes
1 answer
83 views
Distributed Lagrange multiplier approach to impose constraint in Poisson equation
1 vote
1 answer
62 views
Direct integration of 2D Euler Equations with Runge Kutta shows oscillating Courant-Friedrichs-Lewy coefficient. Stiff or Bug?
1 vote
1 answer
60 views
Building blocks for solving a vector valued problem
2 votes
1 answer
44 views
Python solvers for MINLP in Pyomo in Google Colab
0 votes
0 answers
70 views
Eigen-decomposition one eigenpair by one eigenpair?
0 votes
0 answers
66 views
How to implement large rotations in total lagrangian formulation (nonlinear FEM)?
0 votes
1 answer
40 views
Numerical Error source when dealing with integer series
3 votes
1 answer
65 views
How to model the dynamic impact of transport on boxes containing vials?
0 votes
1 answer
48 views
why is $Hx= x-2u^{H}xu$ ? why not $Hx= x(x-uu^H) + 2((u^Hx)u)^2? $
1 vote
1 answer
46 views
Fast algorithm to compute chi-square
0 votes
0 answers
58 views
Weighted Jacobi Not Working on 1D Poisson (Issue with Optimal $\omega$)
1 vote
0 answers
53 views
robust numerical calculation with large (almost) offsetting terms
2 votes
0 answers
53 views
Change in Variables applied to biharmonic equation
1 vote
0 answers
52 views
Fitting data with a Voigt function
1 vote
1 answer
38 views
solving a Algebraic Differential Equation in Julia using modelingToolKit.JL
1 vote
0 answers
47 views
How to discretize PDEs using Chebyshev spectral method into a system of differential algebraic equations (DAEs)?
1 vote
1 answer
36 views
Why does this implementation for Eisenstein integer pairs of Euclid's method for finding greatest common denominators get stuck for this one point?
1 vote
0 answers
46 views
Solution fails to converge with different collocation point selection
0 votes
1 answer
35 views
Why is a elementwise max not DCP?
1 vote
0 answers
44 views
Prolongation and restriction operators in multigrid for high order PDEs
0 votes
0 answers
44 views
Poisson equation fast solver on large grids
3 votes
0 answers
39 views
Sufficient condition for real roots of a polynomial of order $n>5$ with arbitrary real coefficients

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