Matrix: IPSO/HTC_336_4438
Description: Power simulation matrix, Li Peijie, Inst. of Power Systems, Guangxi Univ.
(undirected graph drawing) |
Matrix properties | |
number of rows | 226,340 |
number of columns | 226,340 |
nonzeros | 783,496 |
structural full rank? | yes |
structural rank | 226,340 |
# of blocks from dmperm | 29,588 |
# strongly connected comp. | 14,796 |
explicit zero entries | 121,026 |
nonzero pattern symmetry | symmetric |
numeric value symmetry | symmetric |
type | real |
structure | symmetric |
Cholesky candidate? | no |
positive definite? | no |
author | L. Peijie |
editor | J. Hogg |
date | 2011 |
kind | power network problem |
2D/3D problem? | no |
Additional fields | size and type |
b | full 226340-by-1 |
Notes:
Three different kinds of optimization methods (OPF, TSCOPF, HTC) applied to power system simulation. All matrices are symmetric indefinite. From Li Peijie, Institute of Power Systems, Guangxi University (beyondpeijie at gxu.edu.cn). Collected by Jonathan Hogg, Rutherford Appleton Laboratory, Oxfordshire, UK.
Ordering statistics: | result |
nnz(chol(P*(A+A'+s*I)*P')) with AMD | 1,119,531 |
Cholesky flop count | 5.7e+07 |
nnz(L+U), no partial pivoting, with AMD | 2,012,722 |
nnz(V) for QR, upper bound nnz(L) for LU, with COLAMD | 40,953,261 |
nnz(R) for QR, upper bound nnz(U) for LU, with COLAMD | 93,401,877 |
Note that all matrix statistics (except nonzero pattern symmetry) exclude the 121026 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.