susbtitution with a condition

[Philippe Piot]

Dear All, 

  I cannot figure out how to impose a condition. I have a function that is defined as a piecewise function. When it returns its results with several Min(x,y). I would like to substitute Min(x,X) with "x" since x<X. I have tried something like (here simplified as my function output as several terms). 

with assuming (x<X):
    print (Min(x,X))

but it does not work [i.e. it does not simplify Min(x,X) with x]. Thanks for any suggestions. 

  Best,  -- Philippe. 

[Aaron Meurer]

assuming() does not work with inequalities yet. The easiest way to
simplify the expression at present is to use expr.subs(Min(x, X), x).

Aaron Meurer

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