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c Scilab ( http://www.scilab.org/ ) - This file is part of Scilab
c Copyright (C) INRIA
c
c This file must be used under the terms of the CeCILL.
c This source file is licensed as described in the file COPYING, which
c you should have received as part of this distribution. The terms
c are also available at
c http://www.cecill.info/licences/Licence_CeCILL_V2.1-en.txt
subroutine deg1l2(tg,ng,imin,ta,mxsol,w,iw,ierr)
C!but
C Determiner la totalite des polynome de degre 1.
C!liste d'appel
C sorties :
C -imin. est le nombre de minimums obtenus.
C -ta. est le tableau dans lequel sont conserves les
C minimums.
C tableaux de travail (dgmax=1)
C - w :32+32*dgmax+7*ng+dgmax*ng+dgmax**2*(ng+2)+2*mxsol
C -iw : 29+dgmax**2+4*dgmax+ mxsol
C!remarque
C on notera que le neq ieme coeff de chaque colonne
C devant contenir le coeff du plus au degre qui est
C toujours 1. contient en fait la valeur du critere
C pour ce polynome.
C!
implicit double precision (a-h,o-y)
dimension ta(mxsol,*),tg(ng+1)
external feq, feqn, jacl2, jacl2n
C
double precision x,phi0,phi,gnrm
dimension w(*), iw(*), xx(1)
integer dgmax
common /sortie/ io,info,ll
common /no2f/ gnrm
C
C
dgmax=1
ltq=1
lwopt=ltq+6+6*dgmax+6*ng+dgmax*ng+dgmax**2*(ng+1)
ltback=lwopt+25+26*dgmax+ng+dgmax**2
lfree = ltback + 2*mxsol
c
c les lrw elements de w suivant w(lwopt) ne doivent pas etre modifies
c d'un appel de optml2 a l'autre
lrw = dgmax**2 + 9*dgmax + 22
lw=lwopt+lrw
c
lneq=1
liwopt=lneq+3+(dgmax+1)*(dgmax+2)
lntb =liwopt + 20+dgmax
lifree=lntb+mxsol
C
minmax = -1
neq = 1
neqbac = 1
iback=0
c
iw(lneq)=neq
iw(lneq+1)=ng
iw(lneq+2)=dgmax
c
w(ltq)=0.99990d+0
w(ltq+1)=1.0d+0
ltg=ltq+2
call dcopy(ng+1,tg,1,w(ltg),1)
C
if (info .gt. 0) call outl2(51,neq,neq,xx,xx,x,x)
do 120 icomp = 1,50
if (minmax .eq. -1) then
nch = 1
call optml2(feq,jacl2,iw(lneq),w(ltq),nch,w(lwopt),
$ iw(liwopt))
if (info .gt. 1) then
call lq(neq,w(ltq),w(lw),w(ltg),ng)
x=sqrt(gnrm)
call dscal(neq,x,w(lw),1)
call outl2(nch,neq,neqbac,w(ltq),w(lw),x,x)
phi0= abs(phi(w(ltq),neq,w(ltg),ng,w(lw)))
lqdot=lw
call feq(iw(lneq),t,w(ltq),w(lqdot))
call outl2(17,neq,neq,w(ltq),w(lqdot),phi0,x)
endif
nch = 2
call optml2(feq,jacl2,iw(lneq),w(ltq),nch,w(lwopt),
$ iw(liwopt))
if (info .gt. 0) then
call lq(neq,w(ltq),w(lw),w(ltg),ng)
x=sqrt(gnrm)
call dscal(neq,x,w(lw),1)
call outl2(nch,neq,neqbac,w(ltq),w(lw),x,x)
phi0= abs(phi(w(ltq),neq,w(ltg),ng,w(lw)))
lqdot=lw
call feq(iw(lneq),t,w(ltq),w(lqdot))
call outl2(17,neq,neq,w(ltq),w(lqdot),phi0,x)
endif
minmax = 1
else
nch = 1
call optml2(feqn,jacl2n,iw(lneq),w(ltq),nch,w(lwopt),
$ iw(liwopt))
if (info .gt. 1) then
call lq(neq,w(ltq),w(lw),w(ltg),ng)
x=sqrt(gnrm)
call dscal(neq,x,w(lw),1)
call outl2(nch,neq,neqbac,w(ltq),w(lw),x,x)
phi0= abs(phi(w(ltq),neq,w(ltg),ng,w(lw)))
lqdot=lw
call feqn(iw(lneq),t,w(ltq),w(lqdot))
call outl2(17,neq,neq,w(ltq),w(lqdot),phi0,x)
endif
nch = 2
call optml2(feqn,jacl2n,iw(lneq),w(ltq),nch,w(lwopt),
$ iw(liwopt))
if (info .gt. 0) then
call lq(neq,w(ltq),w(lw),w(ltg),ng)
x=sqrt(gnrm)
call dscal(neq,x,w(lw),1)
call outl2(nch,neq,neqbac,w(ltq),w(lw),x,x)
phi0= abs(phi(w(ltq),neq,w(ltg),ng,w(lw)))
lqdot=lw
call feqn(iw(lneq),t,w(ltq),w(lqdot))
call outl2(17,neq,neq,w(ltq),w(lqdot),phi0,x)
endif
minmax = -1
endif
if (abs(w(ltq)) .gt. 1.0d+0) goto 140
if (minmax .eq. 1) then
if (icomp .eq. 1) then
imin = 1
ta(imin,1) = w(ltq)
ta(imin,2) = phi(w(ltq),neq,tg,ng,w(lwopt))
else
call storl2(neq,w(ltq),w(ltg),ng,imin,ta,iback,iw(lntb),
& w(ltback),nch,mxsol,w(lwopt),ierr)
if (ierr .gt. 0) return
endif
endif
w(ltq) = w(ltq) - 0.000010d+0
120 continue
C
140 if (info .gt. 0) then
x = real(mxsol)
call outl2(52,neq,imin,ta,xx,x,x)
endif
C
return
end
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