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- HEMV(3F) Last changed: 11-2-98
-
-
- NNAAMMEE
- CCHHEEMMVV, ZZHHEEMMVV - Multiplies a complex vector by a complex Hermitian
- matrix
-
- SSYYNNOOPPSSIISS
- Complex
-
- CCAALLLL CCHHEEMMVV ((_u_p_l_o,, _n,, _a_l_p_h_a,, _a,, _l_d_a,, _x,, _i_n_c_x,, _b_e_t_a,, _y,, _i_n_c_y))
-
- Double complex
-
- CCAALLLL ZZHHEEMMVV ((_u_p_l_o,, _n,, _a_l_p_h_a,, _a,, _l_d_a,, _x,, _i_n_c_x,, _b_e_t_a,, _y,, _i_n_c_y))
-
- IIMMPPLLEEMMEENNTTAATTIIOONN
- IRIX systems
-
- DDEESSCCRRIIPPTTIIOONN
- These routines perform the following matrix-vector operation:
-
- _y <- _a_l_p_h_a _A_x + _b_e_t_a _y
-
- where _a_l_p_h_a and _b_e_t_a are scalars, _x and _y are _n-element vectors, and _A
- is an _n-by-_n Hermitian matrix.
-
- These routines have the following arguments:
-
- _u_p_l_o Character*1. (input)
- Specifies whether the upper or lower triangular part of
- array _a is referenced, as follows:
-
- _u_p_l_o= 'U' or 'u': only the upper triangular part of _a is
- referenced.
- _u_p_l_o= 'L' or 'l': only the lower triangular part of _a is
- referenced.
-
- _n Integer. (input)
- Specifies the order of matrix _A. _n >= 0.
-
- _a_l_p_h_a Scalar alpha. (input)
- CCHHEEMMVV: Complex.
- ZZHHEEMMVV: Double complex.
-
- _a Array of dimension (_l_d_a,_n). (input)
- CCHHEEMMVV: Complex array.
- ZZHHEEMMVV: Double complex array.
-
- Before entry with _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.
-
- Before entry with _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
- and are assumed to be 0.
-
- _l_d_a Integer. (input)
- Specifies the first dimension of _a as declared in the
- calling program.
- Argument _l_d_a >= MMAAXX(1,_n).
-
- _x Array of dimension 1+(_n-1) * |_i_n_c_x|. (input)
- CCHHEEMMVV: Complex array.
- ZZHHEEMMVV: Double complex array.
- Contains vector _x.
-
- _i_n_c_x Integer. (input)
- Specifies the increment for the elements of _x. _i_n_c_x must
- not be 0.
-
- _b_e_t_a Scalar beta. If _b_e_t_a is supplied as 0, _y need not be set on
- input.
- CCHHEEMMVV: Complex.
- ZZHHEEMMVV: Double complex.
-
- _y Array of dimension 1+(_n-1) * |_i_n_c_y|. (input and output)
- CCHHEEMMVV: Complex array.
- ZZHHEEMMVV: Double complex array.
- Contains vector _y. On exit, the updated vector overwrites
- array _y.
-
- _i_n_c_y Integer. (input)
- Specifies the increment for the elements of _y. _i_n_c_y must
- not be 0.
-
- NNOOTTEESS
- CCHHEEMMVV/ZZHHEEMMVV is a Level 2 Basic Linear Algebra Subprogram (Level 2
- BLAS).
-
- When working backward (_i_n_c_x < 0 or _i_n_c_y < 0), this routine starts at
- the end of the vector and moves backward, as follows:
-
- _x(1-_i_n_c_x * (_n-1)), _x(1-_i_n_c_x * (_n-2)) , ..., _x(1)
-
- _y(1-_i_n_c_y * (_n-1)), _y(1-_i_n_c_y * (_n-2)) , ..., _y(1)
-
- SSEEEE AALLSSOO
- SSYYMMVV(3F)
-
- This man page is available only online.
-