Matrix properties
number of rows	155,924
number of columns	155,924
nonzeros	2,094,873
structural full rank?	yes
structural rank	155,924
# of blocks from dmperm	565
# strongly connected comp.	565
explicit zero entries	3,321,485
nonzero pattern symmetry	symmetric
numeric value symmetry	37%
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 155924-by-1

Notes:

next: Schenk_ISEI/para-6 first: Schenk_ISEI/para-5

Ordering statistics:	result
nnz(chol(P*(A+A'+s*I)*P')) with AMD	235,874,915
Cholesky flop count	1.2e+12
nnz(L+U), no partial pivoting, with AMD	471,593,906
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD	632,097,831
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD	969,885,444

Note that all matrix statistics (except nonzero pattern symmetry) exclude the 3321485 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.