Recent content by physicsan

Hi, a thousand thanks! This is exactly what I was looking for! Sorry for my dummy question, it really seems so dummy now :s Thank you again for your profound and amazingly fast help, you really made my day! :)

Hello, I'm quite new to Mathematica and stuck at a point, where I have searched for hours to find a solution, but there seems no way out. Let's say we have two functions, f1[x_,y_]=x+y f2[x_,y_]=x*y How can a build a function f3, which is e.g. the sum of the other functions f1 and f2...