Minimize function in Mathcad 1

It appears as if you need to give all of a functions input arguments when using minimize or maximize.

If you're using M11 then you can define an auxiliary specialized variant of k(b,t) that only takes b as a parameter, eg kt(b):=k(b,t), which will pick up the value of t in force at the place of definition. If you are using M12..M15 (certainly M13..M15, can't speak for M12 for sure), then you could use a local function definition to allow you to temporarily create a function within the call to minimize itself (eg, minimize(f(b)<-k(b,t),b) ... again, it will pick up the in-force value of t.

You also need to write sigma with all of it input arguments within the solve block, not just give its name.

Thank you very much, excognito, it looks like it works the way you described! I will play with it a little bit, to see if I can get some realistic results .

Kein Problem!