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Question
Can I get the integral formula using Matlab?
I have the following integration: and and are integers. Can I get the formula for this integration using Matlab? Here i...
plus de 4 ans il y a | 2 réponses | 0
2
réponsesQuestion
How can I find a specific toolbox
Hi, I read a paper about a toolbox for solving the first order ODE using exponential integartors that is called EXPODE. I d...
plus de 4 ans il y a | 1 réponse | 0
1
réponseQuestion
How to make R close to the identity
Hi everyone.. Is there any idea how I can make the matrix in qr factorisation close to the identity? Here is my attempt f...
presque 5 ans il y a | 1 réponse | 0
1
réponseQuestion
write a vector with 3 values inside a loop
Hi everyone, I have a code and I'm looking to find in which real values of y-1=0. Here eigA find eigenvalues of $3x3$ matrix ...
presque 5 ans il y a | 1 réponse | 0
0
réponseQuestion
changing the ode inside ode45
Hi everyone, I'm trying to solve an ode using ode45 which comes basically from matrix second order ode. My idea is to solve fir...
presque 5 ans il y a | 1 réponse | 0
0
réponseQuestion
ode45 with matrix 1st order ode
Hi everyone, I'm trying to solve a first order ode in a matrix form using ode45: where and $Q=\begin{pmatrix} \sin(x) & 0 ...
presque 5 ans il y a | 1 réponse | 0
1
réponseQuestion
obtaining the shifts inside the sptarn code
Is there any way to know a value used inside a code? For example in the SPTARN code, which used to solve the generalized spa...
plus de 5 ans il y a | 1 réponse | 0
0
réponseQuestion
Arnoldi method to find eigenvalues
I'm trying to implement the Arnoldi method with the inverse power method to find eigenvalues of large pencil matrix. I have fol...
plus de 5 ans il y a | 1 réponse | 0
1
réponseQuestion
another syntax to obtain eigenvalues?
Is there any other syntax to find eigenvalues of pencil matrix differes from eig?
plus de 5 ans il y a | 1 réponse | 0
0
réponseQuestion
solving eigenvalues PDE problem
I'm working on solving an eigenvalue problem on a domain . I'm intersted on the eigenvalues on the left hand side of the domain...
plus de 5 ans il y a | 1 réponse | 0
1
réponseQuestion
questions about the 'pdeeig'
I'm using the syntax [?,?]=??????(?,?,?,?.1.0,?,1.0,[−1,1]); to solve a PDE on a given domain with a given ? , I have two quest...
presque 6 ans il y a | 1 réponse | 0
1
réponseQuestion
specify coefficients in pdeeig
I'm working on finding the eigenvalues of a PDE, I'm using: [v,l] = pdeeig(b,p,e,t,1.0,'c*exp(-x)',1.0,[-5 0.9]); the sixth entr...
environ 6 ans il y a | 1 réponse | 0
