...SPEC.SPC
On VM/CMS systems, the file will be SPEC SPC. 
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...SAVEDATA.d
SAVEDATA D on VM/CMS systems. 
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...keyword
If the semi-bandwidth m is specified, a banded preconditioner with 2m+1 nonzero diagonals will be used. Hence m=1, say, results in a tridiagonal preconditioner.
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Nick Gould
Thu 16 May 11:08:00 1996