I have already asked a related question here why set values in this way doesn't work? But I think I have to write the question which I encountered explicitly? ...
Basic Issue: I'm trying to understand the proper use of NumericQ's "magical" capabilities. Please consider the examples below. Actual question and some links are ...
In mentally building a model of how Mathematica works, I naively expected Set to create a Rule in a symbol's ...
I have a set of PDE's that depend on parameters. They depend on many parameters, but for simplicity we can here assume that they depend only on one, say a. I want ...
Given a function with the attribute HoldFirst, HoldAll or similar, and a variable, list, how ...
This line returns 3: x = 1; ++++x However, the value of x after the increment is only ...
I have a function-defining function SetAttributes[DefFn, HoldAll]; DefFn[f_[args___], body_] := f[args] := body; I am trying to modify this function to record ...
SubValues, as discussed in a previous question, are declared as follows ...
I've got a situation where I have, say 4 symbols, a, b, c and ...