[Haskell-cafe] Re: Numeric.LinearProgramming - confusion in
constructors for bounds
aruiz at um.es
Wed Mar 31 09:57:07 EDT 2010
You are right, the operators are misleading. I will change them to
":<=:" and ":>=:". And perhaps the symbol ":&:" for the interval bound
should also be improved...
Thanks for your suggestion!
Ozgur Akgun wrote:
> Hi everyone and Alberto,
> Numeric.LinearProgramming provides a very nice interface for solving
> LP optimisation problems, and the well-known simplex algorithm itself. I
> must say I quite liked the interface it provides, simple yet sufficient.
> But, to my understanding, there is a confusion in the constructor name
> (symbols actually) for constraints. In LP, one needs to write
> constraints in the form of ==, <=, or >= only. You /cannot /write a
> constraint using strict inequalities. The algorithm has nothing wrong,
> but I guess it would be better to have constructor symbols right. See 
> If this is a design choice, I think it should explicitly be stated.
>  http://hackage.haskell.org/package/hmatrix-glpk
> Ozgur Akgun
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