Matrix properties
number of rows	46,835
number of columns	46,835
nonzeros	2,329,092
structural full rank?	yes
structural rank	46,835
# of blocks from dmperm	8
# strongly connected comp.	8
explicit zero entries	44,909
nonzero pattern symmetry	symmetric
numeric value symmetry	24%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	S. Bova
editor	T. Davis
date	1997
kind	computational fluid dynamics problem
2D/3D problem?	yes

Additional fields	size and type
b	full 46835-by-1

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	4,393,513
Cholesky flop count	7.1e+08
nnz(L+U), no partial pivoting, with AMD	8,740,191
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	7,229,037
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	16,980,075

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 44909 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.