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Is there a formula to identify valid positions in an upper triangular matrix?

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#matrices #sparse-matrices
111
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Eigenpairs of a sparse symmetric block tridiagonal matrix with diagonal blocks on the outer diagonals

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#linear-algebra #eigenvalues-eigenvectors #block-matrices #sparse-matrices #tridiagonal-matrices
586
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Inverse of a symmetric tridiagonal matrix

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#linear-algebra #matrices #inverse #sparse-matrices #tridiagonal-matrices
378
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Inverse of symmetric matrix that is almost diagonal

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#linear-algebra #matrices #inverse #sparse-matrices
28
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Estimating sparse precision matrices - penalised likelihood method

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#maximum-likelihood #log-likelihood #sparse-matrices
134
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Does a sparsified correlation matrix follow the Perron Frobenius theorem?

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#linear-algebra #matrices #eigenvalues-eigenvectors #matrix-decomposition #sparse-matrices
1.3k
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Inverse of a large sparse matrix in Matlab

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#numerical-methods #markov-chains #inverse #numerical-linear-algebra #sparse-matrices
287
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Symmetric sparse matrix inversion

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#linear-algebra #sparse-matrices
471
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compute $C = AB^{-1}A^T$ without inverting B

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#linear-algebra #matrices #inverse #numerical-linear-algebra #sparse-matrices
1.9k
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Fast algorithm for approximating eigenvalue distribution of large sparse matrix

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#matrices #eigenvalues-eigenvectors #matlab #numerical-linear-algebra #sparse-matrices
1.4k
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Is it possible to use the deflation algorithm to compute the eigenvalues of a large sparse matrix?

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#linear-algebra #matrices #eigenvalues-eigenvectors #numerical-linear-algebra #sparse-matrices
200
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Cholesky solve for semi-definite system

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#linear-algebra #matrix-decomposition #sparse-matrices #lu-decomposition
71
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How to recover sparse circulant matrix based on its partial eigenvalues?

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#matrices #optimization #diagonalization #sparse-matrices #circulant-matrices
58
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How to solve linear system with sparse large matrix?

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#linear-algebra #matrices #systems-of-equations #numerical-linear-algebra #sparse-matrices
86
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How to generate random sparse unitary with given density?

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#random-variables #sparse-matrices #unitary-matrices

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