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clean_zeros -- Eliminate zero coefficients 

    call a%clean_zeros(info)

Eliminates zero coefficients in the input matrix. Note that depending on the internal storage format, there may still be some amount of zero padding in the output.

Type:
Asynchronous.
On Entry
a
the sparse matrix.
A variable of type psb_Tspmat_type.
Scope: local.
On Return
a
The matrix a without zero coefficients.
A variable of type psb_Tspmat_type.
info
Return code.