symv Interface

public interface symv

SYMV performs the matrix-vector operation y := alphaAx + beta*y, where alpha and beta are scalars, x and y are n element vectors and A is an n by n symmetric matrix.


Subroutines

public pure subroutine dsymv(uplo, n, alpha, a, lda, x, incx, beta, y, incy)

Arguments

Type IntentOptional Attributes Name
character(len=1), intent(in) :: uplo
integer(kind=ilp), intent(in) :: n
real(kind=dp), intent(in) :: alpha
real(kind=dp), intent(in) :: a(lda,*)
integer(kind=ilp), intent(in) :: lda
real(kind=dp), intent(in) :: x(*)
integer(kind=ilp), intent(in) :: incx
real(kind=dp), intent(in) :: beta
real(kind=dp), intent(inout) :: y(*)
integer(kind=ilp), intent(in) :: incy

public pure subroutine ssymv(uplo, n, alpha, a, lda, x, incx, beta, y, incy)

Arguments

Type IntentOptional Attributes Name
character(len=1), intent(in) :: uplo
integer(kind=ilp), intent(in) :: n
real(kind=sp), intent(in) :: alpha
real(kind=sp), intent(in) :: a(lda,*)
integer(kind=ilp), intent(in) :: lda
real(kind=sp), intent(in) :: x(*)
integer(kind=ilp), intent(in) :: incx
real(kind=sp), intent(in) :: beta
real(kind=sp), intent(inout) :: y(*)
integer(kind=ilp), intent(in) :: incy

Module Procedures

public pure subroutine stdlib_dsymv(uplo, n, alpha, a, lda, x, incx, beta, y, incy)

DSYMV performs the matrix-vector operation y := alphaAx + beta*y, where alpha and beta are scalars, x and y are n element vectors and A is an n by n symmetric matrix.

Arguments

Type IntentOptional Attributes Name
character(len=1), intent(in) :: uplo
integer(kind=ilp), intent(in) :: n
real(kind=dp), intent(in) :: alpha
real(kind=dp), intent(in) :: a(lda,*)
integer(kind=ilp), intent(in) :: lda
real(kind=dp), intent(in) :: x(*)
integer(kind=ilp), intent(in) :: incx
real(kind=dp), intent(in) :: beta
real(kind=dp), intent(inout) :: y(*)
integer(kind=ilp), intent(in) :: incy

public pure subroutine stdlib_ssymv(uplo, n, alpha, a, lda, x, incx, beta, y, incy)

SSYMV performs the matrix-vector operation y := alphaAx + beta*y, where alpha and beta are scalars, x and y are n element vectors and A is an n by n symmetric matrix.

Arguments

Type IntentOptional Attributes Name
character(len=1), intent(in) :: uplo
integer(kind=ilp), intent(in) :: n
real(kind=sp), intent(in) :: alpha
real(kind=sp), intent(in) :: a(lda,*)
integer(kind=ilp), intent(in) :: lda
real(kind=sp), intent(in) :: x(*)
integer(kind=ilp), intent(in) :: incx
real(kind=sp), intent(in) :: beta
real(kind=sp), intent(inout) :: y(*)
integer(kind=ilp), intent(in) :: incy