NOS2: Lanczos with partial reorthogonalization
Finite element approximation to biharmonic operator on a beam with one end free and one end fixed. 240 elements with 3 DOF per node.

from set LANPRO, from the Harwell-Boeing Collection

Download as

Compressed MatrixMarket format file: nos2.mtx.gz (9680 bytes)
Compressed Harwell-Boeing format file: nos2.rsa.gz (6116 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 ] 120942 bytes

Matrix Statistics

Size	Type
957 x 957, 2547 entries	real symmetric positive definite
Nonzeros
total diagonal below diagonal above diagonal A-A' 4137 957 1590 1590 0
Column Data	Row Data
Average nonzeros per column : 4.3 Standard deviation : 0.95 index nonzeros longest 5 5 shortest 1 2	Average nonzeros per row : 4.3 Standard deviation : 0.95 index nonzeros longest 5 5 shortest 1 2
Bandwidths	Profile Storage
lower 5 upper 5 average |i-j| 2.3 std.dev. 1.4	min max ave. std.dev. lower bandwidth 1 5 4.3 0.51 upper bandwidth 1 5 4.3 0.51 Symmetric skyline storage requirement:4137
Heaviest diagonals
offset from main 0 -3 3 -4 -2 2 4 nonzeros 957 954 954 318 318 318 318 accumulated percent 23.13 46.19 69.25 76.94 84.63 92.31 100.00 Top 7 out of 7 nonvoid diagonals.
Conditioning
Frobenius norm 1.7e+12 condition number (est.) 6.3e+09 2-norm (est.) 1.6e+11 diagonal dominance no

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Last change in this page: Wed Sep 22 13:33:41 US/Eastern 2004 [Comments: ]