I have the following inequality system :
[ U1,2 + U1,3 -1 = 0,
U2,3 - U1,2 = 0,
-U1,3 -U2,3+1 = 0,
0 <= U1,3,
0 <= U2,3]
I want to solve it using LinearMultivariateSystem, namely I excuted a command :
[ U1,2 + U1,3 -1 = 0, U2,3 - U1,2 = 0, -U1,3 -U2,3+1 = 0, 0 <=U1,2, 0 <= U1,3, 0 <= U2,3],
[U1,2, U1,3, U2,3] )
Then the following is return :
Error, (in Utilities:-SimpleAnd) invalid input: a string/name list is expected for sort method `lexorder`
I tried that sort([U1,2, U1,3, U2,3] , lexorder) but it dosen't work well.
Also I tried replacing variables so that [U1,2, U1,3, U2,3] -> [x, y, z], then it is succesfull.
My question is that how do you use LinearMultivariateSystem for varibles indexed by two params.