BCSSTK13: BCS Structural Engineering Matrices (eigenvalue matrices)
Fluid flow generalized eigenvalues

from set BCSSTRUC1, from the Harwell-Boeing Collection

From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix K; matrix M is BCSSTM13 from BCSSTRUC1 set.

Download as

Compressed MatrixMarket format file: bcsstk13.mtx.gz (338034 bytes)
Compressed Harwell-Boeing format file: bcsstk13.rsa.gz (242187 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
2003 x 2003, 42943 entries	real symmetric positive definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 83883 2003 40940 40940 0
Column Data	Row Data
Average nonzeros per column : 42 Standard deviation : 23 index nonzeros longest 1534 95 shortest 34 5	Average nonzeros per row : 42 Standard deviation : 23 index nonzeros longest 1534 95 shortest 34 5
Bandwidths	Profile Storage
lower 1251 upper 1251 average |i-j| 1.3e+02 std.dev. 1.9e+02	min max ave. std.dev. lower bandwidth 1 1251 2.2e+02 2.7e+02 upper bandwidth 1 1251 2.2e+02 2.7e+02 Symmetric skyline storage requirement:436801
Heaviest diagonals
offset from main 0 -1 1 -2 2 -4 4 -6 6 -5 nonzeros 2003 1358 1358 1142 1142 1056 1056 1033 1033 836 accumulated percent 2.39 4.01 5.63 6.99 8.35 9.61 10.87 12.10 13.33 14.33 Top 10 out of 1841 nonvoid diagonals.
Conditioning
Frobenius norm 7.5e+12 condition number (est.) 4.6e+10 2-norm (est.) 3.1e+12 diagonal dominance no

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