I am trying to use a simple sum ( f:=t,n->sum(MyFunction(k,t),k=1..n) ), but the sum function doesn't "work" :
Error, (in MTM:-sum) invalid input: ArrayTools:-AddAlongDimension expects its 2nd argument, DimToAdd, to be of type posint, but received k = 1 .. n
As far as I can understand, I have loaded the package MTM, and now, the sum has been redefined to do something else, and now I can't use a "normal" sum anymore. Or can I ?
Does someone know how to use the "normal" sum without unloading the MTM package ?