CURTIS54: Original Harwell sparse matrix test collection
stiff biochemical ordinary differential equations (ODEs)

from set SMTAPE, from the Harwell-Boeing Collection

Due to A. R. Curtis, 1971

Download as

Compressed MatrixMarket format file: curtis54.mtx.gz (645 bytes)
Compressed Harwell-Boeing format file: curtis54.pua.gz (556 bytes)

Visualizations

Click on image to get an enlarged version. Click on label to get an explanation.

Structure Plot

Matrix Statistics

Size	Type
54 x 54, 291 entries	pattern unsymmetric
Nonzeros
total diagonal below diagonal above diagonal A-A' 291 54 121 116 22
Column Data	Row Data
Average nonzeros per column : 5.4 Standard deviation : 2.2 index nonzeros longest 7 16 shortest 1 3	Average nonzeros per row : 5.4 Standard deviation : 1.9 index nonzeros longest 7 12 shortest 1 3
Bandwidths	Profile Storage
lower 45 upper 45 average |i-j| 4.9 std.dev. 8.9	min max ave. std.dev. lower bandwidth 0 44 8.6 11 upper bandwidth 0 44 8.1 11 Nonsymmetric skyline storage 849
Heaviest diagonals
offset from main 0 -1 1 -2 2 -3 3 -4 4 -7 nonzeros 54 37 36 29 28 14 14 9 8 5 accumulated percent 18.56 31.27 43.64 53.61 63.23 68.04 72.85 75.95 78.69 80.41 Top 10 out of 46 nonvoid diagonals.
Conditioning
Pattern matrix. No conditioning information.

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Last change in this page: Wed Sep 22 13:33:51 US/Eastern 2004 [Comments: ]