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- HEMM(3F) Last changed: 11-2-98
-
-
- NNAAMMEE
- CCHHEEMMMM, ZZHHEEMMMM - Multiplies a complex general matrix by a complex
- Hermitian matrix
-
- SSYYNNOOPPSSIISS
- Complex
-
- CCAALLLL CCHHEEMMMM ((_s_i_d_e,, _u_p_l_o,, _m,, _n,, _a_l_p_h_a,, _a,, _l_d_a,, _b,, _l_d_b,, _b_e_t_a,, _c,, _l_d_c))
-
- Double complex
-
- CCAALLLL ZZHHEEMMMM ((_s_i_d_e,, _u_p_l_o,, _m,, _n,, _a_l_p_h_a,, _a,, _l_d_a,, _b,, _l_d_b,, _b_e_t_a,, _c,, _l_d_c))
-
- IIMMPPLLEEMMEENNTTAATTIIOONN
- IRIX systems
-
- DDEESSCCRRIIPPTTIIOONN
- These routines multiply a complex general matrix by a complex
- Hermitian matrix. They perform one of the following matrix-matrix
- operations:
-
- _C <- _a_l_p_h_a _A_B + _b_e_t_a _C
-
- _C <- _a_l_p_h_a _B_A + _b_e_t_a _C
- where _a_l_p_h_a and _b_e_t_a are scalars, _A is a Hermitian matrix, and _B and _C
- are _m-by-_n matrices.
-
- These routines have the following arguments:
-
- _s_i_d_e Character*1. (input)
- Specifies whether the Hermitian matrix _A appears on the left
- or right in the operation, as follows:
- _s_i_d_e = 'L' or 'l': _C <- _a_l_p_h_a _A_B + _b_e_t_a _C
- _s_i_d_e = 'R' or 'r': _C <- _a_l_p_h_a _B_A + _b_e_t_a _C
-
- _u_p_l_o Character*1. (input)
- Specifies whether the upper or lower triangular part of the
- Hermitian matrix _A is referenced, as follows:
-
- _u_p_l_o = 'U' or 'u': only the upper triangular part of the
- Hermitian matrix is referenced.
- _u_p_l_o = 'L' or 'l': only the lower triangular part of the
- Hermitian matrix is referenced.
-
- _m Integer. (input)
- Specifies the number of rows in matrix _C. _m must be >= 0.
-
- _n Integer. (input)
- Specifies the number of columns in matrix _C. _n must be >=
- 0.
-
- _a_l_p_h_a First scalar factor. (input)
- CCHHEEMMMM: Complex.
- ZZHHEEMMMM: Double complex.
-
- _a Array of dimension (_l_d_a,_k_a). (input)
- CCHHEEMMMM: Complex array.
- ZZHHEEMMMM: Double complex array.
-
- Contains matrix _A. When _s_i_d_e = 'L' or 'l', _k_a is _m;
- otherwise, it is _n.
-
- Before entry with _s_i_d_e = 'L' or 'l', the _m-by-_m part of
- array _a must contain the Hermitian matrix, such that:
-
- * If _u_p_l_o = 'U' or 'u', the leading _m-by-_m upper triangular
- part of array _a must contain the upper triangular part of
- the Hermitian matrix. The strictly lower triangular part
- of _a is not referenced.
-
- * If _u_p_l_o = 'L' or 'l', the leading _m-by-_m lower triangular
- part of array _a must contain the lower triangular part of
- the Hermitian matrix. The strictly upper triangular part
- of _a is not referenced.
-
- Before entry with _s_i_d_e = 'R' or 'r', the _n-by-_n part of
- array _a must contain the Hermitian matrix, such that:
-
- * If _u_p_l_o = 'U' or 'u', the leading _n-by-_n upper triangular
- part of array _a must contain the upper triangular part of
- the Hermitian matrix. The strictly lower triangular part
- of _a is not referenced.
-
- * If _u_p_l_o = 'L' or 'l', the leading _n-by-_n lower triangular
- part of array _a must contain the lower triangular part of
- the Hermitian matrix. The strictly upper triangular part
- of _a is not referenced.
-
- The imaginary parts of the diagonal elements need not be
- set. They are assumed to be 0.
-
- _l_d_a Integer. (input)
- Specifies the first dimension of _a as declared in the
- calling program. When _s_i_d_e = 'L' or 'l', _l_d_a >= MMAAXX(1,_m);
- otherwise, _l_d_a >= MMAAXX(1,_n).
-
- _b Array of dimension (_l_d_b,_n). (input)
- CCHHEEMMMM: Complex array.
- ZZHHEEMMMM: Double complex array.
- Contains matrix _B. Before entry, the leading _m-by-_n part of
- array _b must contain matrix _B.
-
- _l_d_b Integer. (input)
- Specifies the first dimension of _b as declared in the
- calling program. _l_d_b >= MMAAXX(1,_m).
-
- _b_e_t_a Second scalar factor. (input)
- CCHHEEMMMM: Complex.
- ZZHHEEMMMM: Double complex.
- When _b_e_t_a is supplied as 0, _c need not be set on input.
-
- _c Array of dimension (_l_d_c,_n). (input and output)
- CCHHEEMMMM: Complex array.
- ZZHHEEMMMM: Double complex array.
- Contains matrix _C. Before entry, the leading _m-by-_n part of
- array _c must contain matrix _C, except when _b_e_t_a is 0; in
- which case, _c need not be set. On exit, the _m-by-_n updated
- matrix overwrites array _c.
-
- _l_d_c Integer. (input)
- Specifies the first dimension of _c as declared in the
- calling program. _l_d_c >= MMAAXX(1,_m).
-
- NNOOTTEESS
- CCHHEEMMMM/ZZHHEEMMMM is a Level 3 Basic Linear Algebra Subprogram (Level 3
- BLAS).
-
- SSEEEE AALLSSOO
- SSYYMMMM(3F)
-
- This man page is available only online.
-