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JAGMESH7: Graded L-shape patterns
THree 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
1138 x 1138, 4294 entries pattern symmetric indefinite
Nonzeros
totaldiagonalbelow diagonalabove diagonalA-A'
7450 1138 3156 3156 0
Column Data Row Data
Average nonzeros per column : 6.5
Standard deviation : 0.84

indexnonzeros
longest2 7
shortest202 4

Average nonzeros per row : 6.5
Standard deviation : 0.84

indexnonzeros
longest2 7
shortest202 4

Bandwidths Profile Storage
lower904 upper904
average |i-j|23 std.dev.94
minmaxave.std.dev.
lower bandwidth1 904 38 1.2e+02
upper bandwidth1 904 38 1.2e+02

Symmetric skyline storage requirement:43148

Heaviest diagonals
offset from main0 -1 1 -3 3 -10 10 -2 2 -11
nonzeros1138 932 932 280 280 254 254 234 234 188
accumulated percent15.2827.7940.3044.0547.8151.2254.6357.7760.9163.44

Top 10 out of 355 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: ]