Matrix: Rajat/rajat04

Description: Rajat/rajat04 circuit simulation matrix

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• Matrix group: Rajat
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• download as a MATLAB mat-file, file size: 55 KB. Use UFget(1188) or UFget('Rajat/rajat04') in MATLAB.
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 Matrix properties number of rows 1,041 number of columns 1,041 nonzeros 8,725 structural full rank? yes structural rank 1,041 # of blocks from dmperm 67 # strongly connected comp. 1 explicit zero entries 917 nonzero pattern symmetry symmetric numeric value symmetry 4% type real structure unsymmetric Cholesky candidate? no positive definite? no

 author Rajat editor T. Davis date 2004 kind circuit simulation problem 2D/3D problem? no

 Ordering statistics: result nnz(chol(P*(A+A'+s*I)*P')) with AMD 6,670 Cholesky flop count 5.1e+04 nnz(L+U), no partial pivoting, with AMD 12,299 nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD 171,752 nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD 404,650

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 917 explicit zero entries.

 SVD-based statistics: norm(A) 20921.7 min(svd(A)) 0.000127608 cond(A) 1.63953e+08 rank(A) 1,041 sprank(A)-rank(A) 0 null space dimension 0 full numerical rank? yes

 singular values (MAT file): click here SVD method used: s = svd (full (A)) ; status: ok

For a description of the statistics displayed above, click here.

Maintained by Tim Davis, last updated 12-Mar-2014.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.