Matrix: Rajat/rajat02

Description: Rajat/rajat02 circuit simulation matrix

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• Matrix group: Rajat
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• download as a MATLAB mat-file, file size: 17 KB. Use UFget(1186) or UFget('Rajat/rajat02') in MATLAB.
• download in Matrix Market format, file size: 16 KB.
• download in Rutherford/Boeing format, file size: 15 KB.

 Matrix properties number of rows 1,960 number of columns 1,960 nonzeros 11,187 structural full rank? yes structural rank 1,960 # of blocks from dmperm 58 # strongly connected comp. 10 explicit zero entries 0 nonzero pattern symmetry symmetric numeric value symmetry symmetric type binary structure symmetric 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 8,074 Cholesky flop count 3.6e+04 nnz(L+U), no partial pivoting, with AMD 14,188 nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD 204,210 nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD 520,502

 SVD-based statistics: norm(A) 25.8645 min(svd(A)) 7.48673e-26 cond(A) 3.45471e+26 rank(A) 1,508 sprank(A)-rank(A) 452 null space dimension 452 full numerical rank? no singular value gap 1.26826e+12

 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.