Fork me on GitHub
Math for the people, by the people.

User login

incorrect definition

Primary tabs

incorrect definition

The given definition is incorrect. In particular, not all variables refer to temporal processes. Further, calling a variable a placeholder does not serve to specify what a variable is, as these words are in most contexts synonymous.

Parting words from the person who closed the correction: 
A very liberal attempt at defining all the senses of variable that one is likely to encounter. I have included the most common math definition, and added the original temporal definition as a different sense. Suggestions welcome.
Status: Accepted
Reference to the user who closed the correction.: 
Reference to the article this correction is about: 
Status of the article (was it accepted?): 
1
Status of the article (is it closed?): 
1
What kind of correction is this: 
Error

Comments

Actually, it might be a good idea to distinguish between
different senses of "variable":

(i) normal "mathematical" variables, which stand for some concrete object
e.g. x \in \real

(ii) "formal" variables used in formal polynomials and the like,
e.g. f(x) = 1 + x + x^2 + ... , where the x here is not restricted to be a a real number, complex number, etc.

(iii) "random variables" in statistics , which are really functions
on a measure space, but in practice are denoted with variable notation

(iv) state variables in computer algorithms, which are temporal.
e.g. x <- 2

Variables in mathematical logic, or formal parameters in algorithms might also fall in category (ii), but I'm not sure.

// Steve

Subscribe to Comments for "incorrect definition"