Matrix properties
number of rows	62,424
number of columns	62,424
nonzeros	1,717,763
structural full rank?	yes
structural rank	62,424
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	29
nonzero pattern symmetry	symmetric
numeric value symmetry	6%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	V. Venkatakrishnan
editor	H. Simon
date	1993
kind	subsequent computational fluid dynamics problem
2D/3D problem?	yes

Additional fields	size and type
b	full 62424-by-1

Notes:

next: Simon/venkat50 first: Simon/venkat01

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	5,801,036
Cholesky flop count	1.1e+09
nnz(L+U), no partial pivoting, with AMD	11,539,648
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	10,689,206
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	21,078,156

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 29 explicit zero entries.

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.