fmcTitle ("tp068r3")$

/* Source version 6 */
/* FMCMAC post processor version 1.2 */

/* FMC's second native input language. */
/* The Hock & Schittkowski test problem #68. */
/* This is the formulation of #68 to obtain the reference values for */
/* tp068r2, i.e., tp068r3 is equivalent to tp068r2 down to the last detail. */

mygetvarname (s, i) := eval_string (printf (false, sconcat (s, "~d"), i))$

a : 0.0001b0$
b : 1$
d : 1$
n : 24$
ubx2hs : 100$
           /* phi0(x2 = 6) > 9.8*10^(-10) */
           /* phi0(x2 = 5) > 2.8*10^( -7) */
ubx2r : 4$ /* phi0(x2 = 4) > 3.1*10^( -5) */
           /* phi0(x2 = 3) > 1.3*10^( -3) */
           /* phi0(x2 = 2) > 2.2*10^( -2) */
ubx2 : ubx2r$

iv[1] : 1$ slb[1] : 0.0001b0$ sub[1] :  100$
iv[2] : 1$ slb[2] : 0$        sub[2] : ubx2$
iv[3] : 1$ slb[3] : 0$        sub[3] :    2$
iv[4] : 1$ slb[4] : 0$        sub[4] :    2$

for i : 1 thru 4 do (
  fmcInitialValue     (mygetvarname ("x", i),  iv[i]),
  fmcStrongLowerBound (mygetvarname ("x", i), slb[i]),
  fmcStrongUpperBound (mygetvarname ("x", i), sub[i])
  )$

argn : (-1) * x2 - d * sqrt (n)$
arg0 : (-1) * x2$
argp : (-1) * x2 + d * sqrt (n)$
argnerfc : (-1) * argn / sqrt (2)$
arg0erfc : (-1) * arg0 / sqrt (2)$
argperfc : (-1) * argp / sqrt (2)$
phin : (1/2) * myerfc (fmc_ident_tcb, argnerfc)$
phi0 : (1/2) * myerfc (fmc_ident_tcb, arg0erfc)$
phip : (1/2) * myerfc (fmc_ident_tcb, argperfc)$
c[1] : x3 - 2 * phi0$
c[2] : x4 - phip - phin$ /* phin may vanish but not phip */
num : b * (exp (x1) - 1) - x3$
den : exp (x1) - 1 + x4$
mf : (a * n - (num / den) * x4) / x1$

for j : 1 thru 2 do (
  fmcEquality (mygetvarname ("ce", j), c[j])
  )$

myminfun : mf$
fmcMinimum (myminfun)$

fmcFunctionDiffHint ([ myerfc, 0,
  myerfcd (fmcFunctionArg1, fmcFunctionArg2) ])$

fmcExternalCodePath ("../../doc/RevisedHockSchittkowski/src/tp068r3x.c")$

fmcEscortFloat ('argnerfc, argnerfc)$
fmcEscortFloat ('arg0erfc, arg0erfc)$
fmcEscortFloat ('argperfc, argperfc)$

fmcEscortFloat (derfcn, myerfc (fmc_ident_tcb, argnerfc) - erfc (argnerfc))$
fmcEscortFloat (derfc0, myerfc (fmc_ident_tcb, arg0erfc) - erfc (arg0erfc))$
fmcEscortFloat (derfcp, myerfc (fmc_ident_tcb, argperfc) - erfc (argperfc))$

fmcEscortFloat ('phin, phin)$
fmcEscortFloat ('phi0, phi0)$
fmcEscortFloat ('phip, phip)$

/* argnerfc = 6.042362036830880 */
/* arg0erfc = 2.578260421693126 */
/* argperfc = -0.8858411934446289 */

/* derfcn = 2.9*10^(-17) */
/* derfc0 = -1.4*10^(-17) */
/* derfcp = -4.5*10^(-18) */

/* phin = 2.1*10^(-17) */
/* phi0 = 0.0001330678126076933 */
/* phip = 0.8948550393735502 */

myownabs (x) := fmc_m_abs (x)$

myabsdevnod0_0 : myownabs (myminfun + 0.9204250036397504b0)$
myreldevnod0_0 : myownabs (myminfun/0.9204250036397504b0 + 1)$
myabsdevnod0_1 : myownabs (x1 - 0.06785857708551205b0)$
myreldevnod0_1 : myownabs (x1/0.06785857708551205b0 - 1)$
myabsdevnod0_2 : myownabs (x2 - 3.646210855688194b0)$
myreldevnod0_2 : myownabs (x2/3.646210855688194b0 - 1)$
myabsdevnod0_3 : myownabs (x3 - 0.0002661356252153867b0)$
myreldevnod0_3 : myownabs (x3/0.0002661356252153867b0 - 1)$
myabsdevnod0_4 : myownabs (x4 - 0.8948550393735502b0)$
myreldevnod0_4 : myownabs (x4/0.8948550393735502b0 - 1)$
myabsdevnod1_0 : (1/2)*(myownabs (myabsdevnod0_0 - myabsdevnod0_1) + (myabsdevnod0_0 + myabsdevnod0_1))$
myreldevnod1_0 : (1/2)*(myownabs (myreldevnod0_0 - myreldevnod0_1) + (myreldevnod0_0 + myreldevnod0_1))$
myabsdevnod1_2 : (1/2)*(myownabs (myabsdevnod0_2 - myabsdevnod0_3) + (myabsdevnod0_2 + myabsdevnod0_3))$
myreldevnod1_2 : (1/2)*(myownabs (myreldevnod0_2 - myreldevnod0_3) + (myreldevnod0_2 + myreldevnod0_3))$
myabsdevnod1_4 : myabsdevnod0_4$
myreldevnod1_4 : myreldevnod0_4$
myabsdevnod2_0 : (1/2)*(myownabs (myabsdevnod1_0 - myabsdevnod1_2) + (myabsdevnod1_0 + myabsdevnod1_2))$
myreldevnod2_0 : (1/2)*(myownabs (myreldevnod1_0 - myreldevnod1_2) + (myreldevnod1_0 + myreldevnod1_2))$
myabsdevnod2_4 : myabsdevnod1_4$
myreldevnod2_4 : myreldevnod1_4$
myabsdevnod3_0 : (1/2)*(myownabs (myabsdevnod2_0 - myabsdevnod2_4) + (myabsdevnod2_0 + myabsdevnod2_4))$
myreldevnod3_0 : (1/2)*(myownabs (myreldevnod2_0 - myreldevnod2_4) + (myreldevnod2_0 + myreldevnod2_4))$
zmyabsdevmax : myabsdevnod3_0$
zmyreldevmax : myreldevnod3_0$
fmcEscortFloat (x1, x1)$
fmcEscortFloat (x2, x2)$
fmcEscortFloat (x3, x3)$
fmcEscortFloat (x4, x4)$
fmcEscortFloat ('myminfun, myminfun)$
fmcEscortFloat ('zmyabsdevmax, zmyabsdevmax)$
fmcEscortFloat ('zmyreldevmax, zmyreldevmax)$