Harwell-Boeing Sparse Matrix Collection

BLCKHOLE: BCS Structural Engineering Matrices (linear equations)

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Compressed Harwell-Boeing format

Compressed Matlab format

Symmetric structure matrix.

Matrix characteristics

Identifier: BLCKHOLE

Type:

Order : 2132

# of entries: 8502

Performance: The strange gridding plays havoc with orderings based on level structures, and is nearly a worst case for the Gibbs-Poole-Stockmeyer heuristic. Reverse Cuthill-Mckee and Gibbs-Poole- Stockmeyer are nearly a factor of two away from obtaining the minimum bandwidth of this problem. General sparse methods fair well despite the strange gridding.

Matrix characteristics
Identifier:	BLCKHOLE
Type:
Order :	2132
# of entries:	8502
Performance:	The strange gridding plays havoc with orderings based on level structures, and is nearly a worst case for the Gibbs-Poole-Stockmeyer heuristic. Reverse Cuthill-Mckee and Gibbs-Poole- Stockmeyer are nearly a factor of two away from obtaining the minimum bandwidth of this problem. General sparse methods fair well despite the strange gridding.

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