Matrix properties
number of rows	115,625
number of columns	115,625
nonzeros	2,158,759
structural full rank?	yes
structural rank	115,625
# of blocks from dmperm	436
# strongly connected comp.	436
explicit zero entries	1,738,798
nonzero pattern symmetry	symmetric
numeric value symmetry	20%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	Integrated Sys. Eng.
editor	O. Schenk
date	2003
kind	semiconductor device problem sequence
2D/3D problem?	yes

Additional fields	size and type
b	full 115625-by-1

Notes:

next: Schenk_ISEI/barrier2-10 first: Schenk_ISEI/barrier2-9

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	138,558,741
Cholesky flop count	5.2e+11
nnz(L+U), no partial pivoting, with AMD	277,001,857
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	768,642,652
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	1,174,525,388

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 1738798 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.