f06qkf performs one of the permutation operations
where
is a real matrix, and
is a permutation matrix.
is represented in the form
where
is the permutation matrix that interchanges items
and
; that is,
is the unit matrix with rows and columns
and
interchanged. If
,
.
This routine requires the indices
to be supplied in a real array (the routine takes the integer part of the array elements);
f06qjf performs the same operation with the indices supplied in an integer array.
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