BCSSTM03: BCS Structural Engineering Matrices (eigenvalue matrices)
Small test structure

from set BCSSTRUC1, from the Harwell-Boeing Collection

From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix M; matrix K is BCSSTK03 from BCSSTRUC1 set.

Download as

Compressed MatrixMarket format file: bcsstm03.mtx.gz (779 bytes)
Compressed Harwell-Boeing format file: bcsstm03.rsa.gz (713 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 ] 14506 bytes

Matrix Statistics

Size	Type
112 x 112, 112 entries	real symmetric positive semi-definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 72 72 0 0 0
Column Data	Row Data
Average nonzeros per column : 0.64 Standard deviation : 0.48 index nonzeros longest 1 1 shortest 7 0	Average nonzeros per row : 0.64 Standard deviation : 0.48 index nonzeros longest 1 1 shortest 7 0
Bandwidths	Profile Storage
lower 1 upper 1 average |i-j| 0 std.dev. 0	min max ave. std.dev. lower bandwidth 1 113 20 32 upper bandwidth 1 113 20 32 Symmetric skyline storage requirement:2228
Heaviest diagonals
offset from main 0 nonzeros 72 accumulated percent 100.00 Top 1 out of 1 nonvoid diagonals.
Conditioning
Frobenius norm 1e+04 condition number (est.) Inf 2-norm (est.) 5.4e+03 diagonal dominance no

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