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JAGMESH8: Graded L-shape patterns
Six hole problem

from set JAGMESH, from the Harwell-Boeing Collection

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Visualizations

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Structure Plot
structure plot


Matrix Statistics

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Size Type
1141 x 1141, 4303 entries pattern symmetric indefinite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
7465 1141 3162 3162 0
Column Data Row Data
Average nonzeros per column : 6.5
Standard deviation : 0.85

indexnonzeros
longest2 7
shortest1 4

Average nonzeros per row : 6.5
Standard deviation : 0.85

indexnonzeros
longest2 7
shortest1 4

Bandwidths Profile Storage
lower226 upper226
average |i-j|18 std.dev.41
minmaxave.std.dev.
lower bandwidth1 226 31 53
upper bandwidth1 226 31 53

Symmetric skyline storage requirement:35571

Heaviest diagonals
offset from main0 -1 1 -3 3 -10 10 -2 2 -11
nonzeros1141 931 931 280 280 256 256 227 227 190
accumulated percent15.2827.7640.2343.9847.7351.1654.5957.6360.6763.22

Top 10 out of 265 nonvoid diagonals.
Conditioning
Pattern matrix. No conditioning information.


Set Information

Set JAGMESH
Source: Alan George, University of Waterloo, Canada.
Discipline:Finite-element model problem
Accession:January 1978


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Last change in this page: Wed Sep 22 13:33:40 US/Eastern 2004 [Comments: ]