LOCK 700: Structural engineering matrices (unassembled) Porch ocean mining
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Note: The previously available version of this matrix in Matrix Market format refects an assembly which differs from what the contributor intended and has been withdrawn. Please discard it if you have taken a copy. The Harwell-Boeing file remains, but requires proper interpretation .

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Size
Type
700 x 700, 3983 entries
pattern symmetric positive definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 22175 691 10742 10742 0

Column Data
Row Data
Average nonzeros per column : 32 Standard deviation : 12

index nonzeros longest 109 60 shortest 487 0

Average nonzeros per row : 32 Standard deviation : 12

index nonzeros longest 109 60 shortest 487 0

Bandwidths
Profile Storage
lower 682 upper 682 average |i-j| 68 std.dev. 1.4e+02

min max ave. std.dev. lower bandwidth 0 681 1.2e+02 1.8e+02 upper bandwidth 0 681 1.2e+02 1.8e+02

Symmetric skyline storage requirement: 81415

Heaviest diagonals
offset from main 0 -1 1 -2 2 -3 3 -4 4 -5
nonzeros 691 634 634 579 579 525 525 482 482 440
accumulated percent 3.12 5.98 8.83 11.45 14.06 16.42 18.79 20.97 23.14 25.12

Top 10 out of 711 nonvoid diagonals.
Conditioning
Pattern matrix. No conditioning information.

Set Information
Set LOCKHEED
Source:
W.A. Loden, Lockheed Palo Alto Research Laboratory
Discipline: Finite-element calculations in structural engineering
Accession: Summer 1980

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Mathematical and Computational Sciences Division /
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National Institute of Standards and Technology .
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Last change in this page: Wed Sep 22 13:33:43 US/Eastern 2004
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