ajout des modèles hs201

src/ADNLPProblems/hs201.jl

@@ -0,0 +1,7 @@
+export hs201
+
+function hs201(; n::Int=default_nvar, type::Val{T}=Val(Float64), kwargs...) where {T}
+    f(x) = 4 * (x[1] - 5)^2 + (x[2] - 6)^2
+    x0 = T[8, 9]
+    return ADNLPModels.ADNLPModel(f, x0, name="hs201"; kwargs...)
+end

src/PureJuMP/hs201.jl

@@ -0,0 +1,24 @@
+# Hock and Schittkowski problem number 201.
+#
+#   Source:
+#   Problem 201 in
+#   K. Schittkowski,
+#   More Test Examples for Nonlinear Programming Codes,
+#   Lectures Notes in Economics and Mathematical Systems 282,
+#   Springer Verlag, Heidelberg, 1987.
+#
+export hs201 
+"HS201 model"
+function hs201(args...; n::Int = default_nvar, kwargs...)
+    model = Model()
+
+    #Déclaration des variables
+    @variable(model, x1)
+    set_start_value(x1, 8)
+    @variable(model, x2)
+    set_start_value(x2, 8)
+
+    #Définition de la fonction objectif
+    @NLobjective(model, Min, 4*(x1-5)^2+(x2-6)^2)
+    return model
+end