BCSSTM07: BCS Structural Engineering Matrices (eigenvalue matrices)
Medium test problem -- consistent mass

from set BCSSTRUC1, from the Harwell-Boeing Collection

From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix M; matrix K is BCSSTK07 from BCSSTRUC1 set.

Download as

Compressed MatrixMarket format file: bcsstm07.mtx.gz (24817 bytes)
Compressed Harwell-Boeing format file: bcsstm07.rsa.gz (17120 bytes)

Visualizations

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

Structure Plot	City Plot
	3D Interactive City Plot
	[ VRML Version 2, gzipped ] 197806 bytes

Matrix Statistics

Size	Type
420 x 420, 3836 entries	real symmetric positive semi-definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 7252 420 3416 3416 0
Column Data	Row Data
Average nonzeros per column : 17 Standard deviation : 6.1 index nonzeros longest 52 26 shortest 3 2	Average nonzeros per row : 17 Standard deviation : 6.1 index nonzeros longest 52 26 shortest 3 2
Bandwidths	Profile Storage
lower 48 upper 48 average |i-j| 19 std.dev. 19	min max ave. std.dev. lower bandwidth 1 48 36 17 upper bandwidth 1 48 36 17 Symmetric skyline storage requirement:15111
Heaviest diagonals
offset from main 0 -1 1 -6 6 -42 42 -3 3 -2 nonzeros 420 344 344 330 330 324 324 305 305 254 accumulated percent 5.79 10.54 15.28 19.83 24.38 28.85 33.31 37.52 41.73 45.23 Top 10 out of 43 nonvoid diagonals.
Conditioning
Frobenius norm 1.8e+04 condition number (est.) 1.2e+04 2-norm (est.) 2.5e+03 diagonal dominance no

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Last change in this page: Wed Sep 22 13:33:24 US/Eastern 2004 [Comments: ]