Where does $\in$ come from and where is it defined?
14074
First usage of the symbol ∈
113005
What does this notation mean? $f(x) \equiv A$?
54304
How to make sense out of the $\epsilon-\delta$ definition of a limit?
13018
Why is $1^{\infty}$ considered to be an indeterminate form
84984
What does $\partial_{\mu}$ mean?
19457
Show that: $\inf(A+B) = \inf(A)+ \inf(B)$
141991
What does the notation $S^n$ mean?
41182
What does the construct x = x || y mean?
22486
What does $\log^{2}{x}$ mean?
153052
What does the degree of a loop in $S^1$ means *intuitively?
153969
The "elements" of a real number
32744
A clarification in a limit
118681
What is the internal representation of inf and NaN?
34918
Difference between $R^\infty$ and $R^\omega$
28851
Origin of "Fits [x] to a T"?
153593
When and why did ^ and $ take on their meanings of "beginning of line" and "end of line?"
100801
A $\log \Gamma $ identity: Where does it come from?