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- HPMV(3F) Last changed: 11-2-98
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-
- NNAAMMEE
- CCHHPPMMVV, ZZHHPPMMVV - Multiplies a complex vector by a packed complex
- Hermitian matrix
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- SSYYNNOOPPSSIISS
- Complex
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- CCAALLLL CCHHPPMMVV ((_u_p_l_o,, _n,, _a_l_p_h_a,, _a_p,, _x,, _i_n_c_x, _b_e_t_a,, _y,, _i_n_c_y))
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- Double complex
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- CCAALLLL ZZHHPPMMVV ((_u_p_l_o,, _n,, _a_l_p_h_a,, _a_p,, _x,, _i_n_c_x, _b_e_t_a,, _y,, _i_n_c_y))
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- 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 complex scalars, _x and _y are _n-element
- vectors, and _A is an _n-by-_n packed complex Hermitian matrix.
-
- These routines have the following arguments:
-
- _u_p_l_o Character*1. (input)
- Specifies whether the upper or lower triangular part of
- matrix _A is packed into the array argument _a_p, as follows:
-
- _u_p_l_o= 'U' or 'u': the upper triangular part of _A is being
- supplied in the argument _a_p.
- _u_p_l_o= 'L' or 'l': the lower triangular part of _A is being
- supplied in the argument _a_p.
-
- _n Integer. (input)
- Specifies the order of matrix _A. _n >= 0.
-
- _a_l_p_h_a Scalar alpha.
- CCHHPPMMVV: Complex.
- ZZHHPPMMVV: Double complex.
-
- _a_p Array of dimension (_n(_n+1))/2 . (input)
- CCHHPPMMVV: Complex array.
- ZZHHPPMMVV: Double complex array.
-
- Before entry with _u_p_l_o = 'U' or 'u', array _a_p must contain
- the upper triangular part of the Hermitian matrix packed
- sequentially, column-by-column, so that _a_p(1) contains
- _A(1,1), _a_p(2) contains _A(1,2), _a_p(3) contains _A(2,2), and so
- on.
-
- Before entry with _u_p_l_o = 'L' or 'l', array _a_p must contain
- the lower triangular part of the Hermitian matrix packed
- sequentially, column-by-column, so that _a_p(1) contains
- _A(1,1), _a_p(2) contains _A(2,1), _a_p(3) contains _A(3,1), and so
- on.
-
- _x Array of dimension 1+(_n-1) * |_i_n_c_x|. (input)
- CCHHPPMMVV: Complex array.
- ZZHHPPMMVV: 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. (input)
- CCHHPPMMVV: Complex.
- ZZHHPPMMVV: Double complex.
- If _b_e_t_a is supplied as 0, _y need not be set on input.
-
- _y Array of dimension 1+(_n-1) * |_i_n_c_y|. (input and output)
- CCHHPPMMVV: Complex array.
- ZZHHPPMMVV: Double complex array.
- Contains vector _y. On exit, _y is overwritten by updated
- vector _y.
-
- _i_n_c_y Integer. (input)
- Specifies the increment for the elements of _y. _i_n_c_y must
- not be 0.
-
- NNOOTTEESS
- CCHHPPMMVV/ZZHHPPMMVV 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
- SSPPMMVV(3F)
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- This man page is available only online.
-