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Given an anti-Hermitian and sparse matrix $X$, I am using Python (NumPy and SciPy) to compute the matrix exponential $f(t) := e^{tX}$ for many values of ...
Asked on 03/15/2021 by Solarflare0
1 answerI want to construct a gauss integration for the weight function: $$w(x) = x^{1/2}$$ $in(0,1)$ of the form:$$int_{0}^{1}x^{1/2}f(x)dx = w_{1}f(x_{1})+w_{2}f(x_{2})$$begin{align*} ...
Asked on 03/12/2021
0 answerI have output from a 3D linear elasticity finite element simulation which uses linear tetrahedral elements, such that the displacement is continuous over the nodes but the gradient is not...
Asked on 03/11/2021 by Charlie S
0 answerI'm trying to apply the compressed sensing theory (CoSaMP algorithm) to the DOA estimation in FMCW ULA (made of 48 elements). In the dechirped signals processing, I use a first...
Asked on 03/06/2021
0 answerThis question is related with this other question:Trying to model a simple second order ODE. On this other question, I get some useful comments on why the simulations...
Asked on 03/05/2021 by Quiet_waters
1 answerGiven a positive objective function $f$ that acts on a real-valued matrix $A$, I am interested in the following problem $$underset{A in mathbb{R}^{n times n}}{text{minimize}} quad f(A)...
Asked on 03/04/2021 by Kawhi
1 answerwhat is the time complexity of gradient $nabla_{f}$ using the $mathcal O$-notation?what is the time complexity of jacobian matrix using the $mathcal O$-notation?who knows some...
Asked on 03/04/2021 by X.Q. Li
0 answerAs far as I understand, you need to define boundary conditions in time and space to select a unique solution to a PDE and make it solvable. However, in ODEs...
Asked on 03/03/2021
1 answerI want to solve a nonlinear ODE of matrix $A(t)$$$mathrm{i}dot A = A(t)M(t),:mathrm{with}: M(t)=A^dagger(t)H(t)A(t)$$ where $H(t)$ and hence $M(t)$ are Hermitian. Therefore, I presume the...
Asked on 03/03/2021
1 answerThis is my first time asking a question here, so I may not be asking this in the right place. I am trying to find the roots of a monotonic...
Asked on 03/03/2021 by jerjorg
1 answerGet help from others!
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