Matrix properties
number of rows	70,656
number of columns	70,656
nonzeros	1,825,580
structural full rank?	yes
structural rank	70,656
# of blocks from dmperm	1
# strongly connected comp.	1
explicit zero entries	2,784
nonzero pattern symmetry	symmetric
numeric value symmetry	symmetric
type	real
structure	symmetric
Cholesky candidate?	yes
positive definite?	yes

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

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	35,877,440
Cholesky flop count	4.1e+10
nnz(L+U), no partial pivoting, with AMD	71,684,224
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	57,045,725
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	103,569,465

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 2784 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.