8
votes
1answer
109 views

Different behaviours of Default Argument

I don't really understand the behaviour of Default Argument. If I execute this command in Mathematica: In: {f[a], f[a + b]} /. f[x_ + y_.] -> p[x, y] ...
2
votes
2answers
192 views

local variable naming & symbolic argument

I'm stuck here with my variable assignment in this scenario ...
12
votes
4answers
944 views

Clear complains that a variable is not a symbol or a string?

Here's a small listing where I've used EscqEsc to typeset θ in the notebook: ...