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Man Pages
lis_array_matvect(3f) Lis Library Functions lis_array_matvect(3f)

lis_array_matvect - calculate the matrix vector product

subroutine lis_array_matvect(LIS_INTEGER n, LIS_SCALAR a(), LIS_SCALAR x(), LIS_SCALAR y(), LIS_INTEGER op, LIS_INTEGER ierr);

Calculate the matrix-vector product A^Tx.

n
The size of the matrix and vectors

a
The array that stores matrix A of size n * n

x
The array that stores vector x of size n

y
The array that stores vector y of size n

op
LIS_INS_VALUE
y = A^Tx
LIS_SUB_VALUE
y = y - A^Tx

y
y

lis(3)

http://www.ssisc.org/lis/

3 Dec 2014 Man Page

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