.nl min function

model.jl

# uncomment lines 9, 79 in nl_params.jl

using JuMP, AmplNLWriter

m = Model(solver=IpoptNLSolver())
@defVar(m, -1 <= x <= 1)
@setNLObjective(m, Max, min( x, -x, 0.5x-0.25 ))

solve(m)

@show getObjectiveValue(m)  # should be -0.1666666666
@show getValue(x)           # should be 0.1666666666

model.nl

g3 1 1 0
 1 0 1 0 0 0
 0 1
 0 0
 0 1 0
 0 0 0 0
 0 0 0 0 0
 0 1
 0 0
 0 0 0 0 0
O0 1
o11
3
v0
o16
v0
o1
o2
n0.5
v0
n0.25
x1
0 0.0
b
0 -1.0 1.0
G0 1
0 0.0