BCSSTK25: BCS Structural Engineering Matrices (eigenvalue problems)
Columbia Center (Seattle) 76-story skyscraper

from set BCSSTRUC3, from the Harwell-Boeing Collection

From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix K; matrix M is BCSSTM25 from BCSSTRUC3 set.

Download as

Compressed MatrixMarket format file: bcsstk25.mtx.gz (1222416 bytes)
Compressed Harwell-Boeing format file: bcsstk25.rsa.gz (859338 bytes)

Visualizations

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

Structure Plot	City Plot

Matrix Statistics

Size	Type
15439 x 15439, 133840 entries	real symmetric indefinite
Nonzeros
total diagonal below diagonal above diagonal A-A' 252241 15439 118401 118401 0
Column Data	Row Data
Average nonzeros per column : 16 Standard deviation : 7.1 index nonzeros longest 13017 59 shortest 3 2	Average nonzeros per row : 16 Standard deviation : 7.1 index nonzeros longest 13017 59 shortest 3 2
Bandwidths	Profile Storage
lower 293 upper 293 average |i-j| 99 std.dev. 90	min max ave. std.dev. lower bandwidth 1 293 1.9e+02 40 upper bandwidth 1 293 1.9e+02 40 Symmetric skyline storage requirement:2959629
Heaviest diagonals
offset from main 0 -2 2 -4 4 -1 1 -6 6 -3 nonzeros 15439 8919 8919 6321 6321 5802 5802 4242 4242 3863 accumulated percent 6.12 9.66 13.19 15.70 18.20 20.50 22.80 24.49 26.17 27.70 Top 10 out of 583 nonvoid diagonals.
Conditioning
Frobenius norm 3.2e+15 condition number (est.) 65 2-norm (est.) 1.1e+15 diagonal dominance no

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Last change in this page: Wed Sep 22 13:33:26 US/Eastern 2004 [Comments: ]