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!----------------------------------------------------------------------
!----------------------------------------------------------------------
! Henon : The Henon map
!----------------------------------------------------------------------
!----------------------------------------------------------------------
SUBROUTINE FUNC(NDIM,U,ICP,PAR,IJAC,F,DFDU,DFDP)
! ---------- ----
IMPLICIT NONE
INTEGER, INTENT(IN) :: NDIM, ICP(*), IJAC
DOUBLE PRECISION, INTENT(IN) :: U(NDIM), PAR(*)
DOUBLE PRECISION, INTENT(OUT) :: F(NDIM)
DOUBLE PRECISION, INTENT(INOUT) :: DFDU(NDIM,NDIM), DFDP(NDIM,*)
DOUBLE PRECISION x, y, alpha, beta
x=U(1)
y=U(2)
alpha=PAR(1)
beta=PAR(2)
F(1)=y
F(2)=alpha-beta*x-y**2
IF(IJAC.EQ.0)RETURN
DFDU(1,1)=0
DFDU(1,2)=1
DFDU(2,1)=-beta
DFDU(2,2)=-2*y
IF(IJAC.EQ.1)RETURN
DFDP(1,1)=0
DFDP(1,2)=0
DFDP(2,1)=1
DFDP(2,2)=-x
END SUBROUTINE FUNC
SUBROUTINE STPNT(NDIM,U,PAR,T)
! ---------- -----
IMPLICIT NONE
INTEGER, INTENT(IN) :: NDIM
DOUBLE PRECISION, INTENT(INOUT) :: U(NDIM),PAR(*)
DOUBLE PRECISION, INTENT(IN) :: T
PAR(1)=2 ! alpha
PAR(2)=0 ! beta
U(1)=1
U(2)=1
END SUBROUTINE STPNT
SUBROUTINE BCND
END SUBROUTINE BCND
SUBROUTINE ICND
END SUBROUTINE ICND
SUBROUTINE FOPT
END SUBROUTINE FOPT
SUBROUTINE PVLS
END SUBROUTINE PVLS
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