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- ZLARFX - applie a complex elementary reflector H to a complex m by n
- matrix C, from either the left or the right
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- SUBROUTINE ZLARFX( SIDE, M, N, V, TAU, C, LDC, WORK )
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- CHARACTER SIDE
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- INTEGER LDC, M, N
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- COMPLEX*16 TAU
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- COMPLEX*16 C( LDC, * ), V( * ), WORK( * )
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- IIIIMMMMPPPPLLLLEEEEMMMMEEEENNNNTTTTAAAATTTTIIIIOOOONNNN
- These routines are part of the SCSL Scientific Library and can be loaded
- using either the -lscs or the -lscs_mp option. The -lscs_mp option
- directs the linker to use the multi-processor version of the library.
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- When linking to SCSL with -lscs or -lscs_mp, the default integer size is
- 4 bytes (32 bits). Another version of SCSL is available in which integers
- are 8 bytes (64 bits). This version allows the user access to larger
- memory sizes and helps when porting legacy Cray codes. It can be loaded
- by using the -lscs_i8 option or the -lscs_i8_mp option. A program may use
- only one of the two versions; 4-byte integer and 8-byte integer library
- calls cannot be mixed.
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- PPPPUUUURRRRPPPPOOOOSSSSEEEE
- ZLARFX applies a complex elementary reflector H to a complex m by n
- matrix C, from either the left or the right. H is represented in the form
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- H = I - tau * v * v'
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- where tau is a complex scalar and v is a complex vector.
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- If tau = 0, then H is taken to be the unit matrix
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- This version uses inline code if H has order < 11.
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- SIDE (input) CHARACTER*1
- = 'L': form H * C
- = 'R': form C * H
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- M (input) INTEGER
- The number of rows of the matrix C.
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- N (input) INTEGER
- The number of columns of the matrix C.
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- V (input) COMPLEX*16 array, dimension (M) if SIDE = 'L'
- or (N) if SIDE = 'R' The vector v in the representation of H.
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- TAU (input) COMPLEX*16
- The value tau in the representation of H.
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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 the
- matrix H * C if SIDE = 'L', or C * H if SIDE = 'R'.
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- LDC (input) INTEGER
- The leading dimension of the array C. LDA >= max(1,M).
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- WORK (workspace) COMPLEX*16 array, dimension (N) if SIDE = 'L'
- or (M) if SIDE = 'R' WORK is not referenced if H has order < 11.
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- SSSSEEEEEEEE AAAALLLLSSSSOOOO
- INTRO_LAPACK(3S), INTRO_SCSL(3S)
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- This man page is available only online.
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