Matrix properties
number of rows	261
number of columns	261
nonzeros	2,319
structural full rank?	yes
structural rank	261
# of blocks from dmperm	1
# strongly connected comp.	1
entries not in dmperm blocks	0
explicit zero entries	0
nonzero pattern symmetry	50%
numeric value symmetry	0%
type	real
structure	unsymmetric
Cholesky candidate?	no
positive definite?	no

author	B. Muite
editor	T. Davis
date	2007
kind	structural problem
2D/3D problem?	yes

Notes:

Chebyshev integration matrix from Benson Muite, Oxford.  Details of the  
matrices can be found in a preprint at http://www.maths.ox.ac.uk/~muite  
entitled "A comparison of Chebyshev methods for solving fourth-order     
semilinear initial boundary value problems," June 2007.   These matrices 
are very ill-conditioned, partly because of the dense rows which are hard
to scale when coupled with the rest of the matrix.                       

Ordering statistics:	AMD	METIS
nnz(chol(P*(A+A'+s*I)*P'))	1,803	2,046
Cholesky flop count	1.3e+04	1.6e+04
nnz(L+U), no partial pivoting	3,345	3,831
nnz(V) for QR, upper bound nnz(L) for LU	1,293	1,293
nnz(R) for QR, upper bound nnz(U) for LU	34,191	34,191

Maintained by Tim Davis, last updated 04-May-2008.
Matrix pictures by cspy, a MATLAB function in the CSparse package.
Matrix graphs by Yifan Hu, AT&T Labs Visualization Group.