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- ZZZZUUUUNNNNMMMMRRRR2222((((3333FFFF)))) ZZZZUUUUNNNNMMMMRRRR2222((((3333FFFF))))
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- NNNNAAAAMMMMEEEE
- ZUNMR2 - overwrite the general complex m-by-n matrix C with Q * C if
- SIDE = 'L' and TRANS = 'N', or Q'* C if SIDE = 'L' and TRANS = 'C', or
- C * Q if SIDE = 'R' and TRANS = 'N', or C * Q' if SIDE = 'R' and TRANS
- = 'C',
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- SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
- SUBROUTINE ZUNMR2( SIDE, TRANS, M, N, K, A, LDA, TAU, C, LDC, WORK, INFO
- )
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- CHARACTER SIDE, TRANS
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- INTEGER INFO, K, LDA, LDC, M, N
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- COMPLEX*16 A( LDA, * ), C( LDC, * ), TAU( * ), WORK( * )
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- PPPPUUUURRRRPPPPOOOOSSSSEEEE
- ZUNMR2 overwrites the general complex m-by-n matrix C with
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- where Q is a complex unitary matrix defined as the product of k
- elementary reflectors
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- Q = H(1)' H(2)' . . . H(k)'
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- as returned by ZGERQF. Q is of order m if SIDE = 'L' and of order n if
- SIDE = 'R'.
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- AAAARRRRGGGGUUUUMMMMEEEENNNNTTTTSSSS
- SIDE (input) CHARACTER*1
- = 'L': apply Q or Q' from the Left
- = 'R': apply Q or Q' from the Right
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- TRANS (input) CHARACTER*1
- = 'N': apply Q (No transpose)
- = 'C': apply Q' (Conjugate transpose)
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- M (input) INTEGER
- The number of rows of the matrix C. M >= 0.
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- N (input) INTEGER
- The number of columns of the matrix C. N >= 0.
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- K (input) INTEGER
- The number of elementary reflectors whose product defines the
- matrix Q. If SIDE = 'L', M >= K >= 0; if SIDE = 'R', N >= K >=
- 0.
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- A (input) COMPLEX*16 array, dimension
- (LDA,M) if SIDE = 'L', (LDA,N) if SIDE = 'R' The i-th row must
- contain the vector which defines the elementary reflector H(i),
- for i = 1,2,...,k, as returned by ZGERQF in the last k rows of
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- PPPPaaaaggggeeee 1111
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- ZZZZUUUUNNNNMMMMRRRR2222((((3333FFFF)))) ZZZZUUUUNNNNMMMMRRRR2222((((3333FFFF))))
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- its array argument A. A is modified by the routine but restored
- on exit.
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- LDA (input) INTEGER
- The leading dimension of the array A. LDA >= max(1,K).
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- TAU (input) COMPLEX*16 array, dimension (K)
- TAU(i) must contain the scalar factor of the elementary reflector
- H(i), as returned by ZGERQF.
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- C (input/output) COMPLEX*16 array, dimension (LDC,N)
- On entry, the m-by-n matrix C. On exit, C is overwritten by Q*C
- or Q'*C or C*Q' or C*Q.
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- LDC (input) INTEGER
- The leading dimension of the array C. LDC >= max(1,M).
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- WORK (workspace) COMPLEX*16 array, dimension
- (N) if SIDE = 'L', (M) if SIDE = 'R'
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- INFO (output) INTEGER
- = 0: successful exit
- < 0: if INFO = -i, the i-th argument had an illegal value
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- PPPPaaaaggggeeee 2222
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