HP MLIB User's Guide Vol. 1 7th Ed.
Chapter 4 Sparse BLAS Operations 537
Variable block row format triangular solve SVBRSM/DVBRSM/CVBRSM/ZVBRSM
beta Scalar parameter.
c( ) Rectangular array with leading dimension ldc.
ldc Leading dimension of c.
work( ) Scratch array of length lwork. lwork should be at least
mb x lb x min(lb, n).
lwork Length of work array.