EXPOKIT's DMEPXV and DGEXPV functions both deal with sparse matrices.
These matrices have a lot of zeros, and can therefore be stored more efficiently by converting the
matrix into CRS (Compressed Row Storage) format.
a 3 column list including the vectors; ia, ja and a.
the dimension of the square (nxn) matrix.
EXPOKIT and its wrapper functions, a CRS-formatted matrix is input as
ia = row pointer. This vector stores the location in the ‘a’ vector that is the first non-zero element
in a row.
ja = column indices for non-zero elements.
a = non-zero elements of the matrix.
This function takes a 3-column list CRS matrix and converts it back to standard square format.
Meabh G. McCurdy firstname.lastname@example.org
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