From generalized eigenvalue problem Kx=(lambda)Mx. This is matrix K; matrix M is BCSSTM08 from BCSSTRUC1 set.
Matrices BCSSTK08 and BCSSTM08 have several clusters of eigenvalues where a doubleton (eigenvalue with multiplicity two) is very close to a third eigenvalue.
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Structure Plot  City Plot 

3D Interactive City Plot  
[ VRML Version 2, gzipped ] 360492 bytes 
Size  Type  

1074 x 1074, 7017 entries  real symmetric positive definite  
Nonzeros  


Column Data  Row Data  
Average nonzeros per column : 12 Standard deviation : 21

Average nonzeros per row : 12 Standard deviation : 21


Bandwidths  Profile Storage  

Symmetric skyline storage requirement:241235 

Heaviest diagonals  
Top 10 out of 1005 nonvoid diagonals. 

Conditioning  

Set BCSSTRUC1  

Source:  John Lewis, Boeing Computer Services, Seattle, Washington, USA 
Discipline:  Dynamic analyses in structural engineering 
Accession:  Summer 1982 
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Last change in this page: Wed Sep 22 13:33:23 US/Eastern 2004 [Comments: ]