What does it mean when someone writes a reunion/intersection symbol before a single set?
26530
What does the big intersection or union sign of a set mean?
80156
Formatting the union of sets
60953
How could we formalize the introduction of new notation?
80546
Why is closure omitted in some group definitions?
134344
What does a dot before the variable name in struct mean?
107154
History of notation: "!"
41899
Notation for: all subsets of size 2
50363
Why does operators bl_idname have to contain 1 dot?
57420
What does limit notation with an underline or an overline mean?
141991
What does the notation $S^n$ mean?
170
What does the @ symbol before a variable name mean in C#?
105594
Fixed point, union of $\aleph_0, \aleph_{\aleph_0},\aleph_{\aleph_{\aleph_0}}\dots$ [see Noah's comment on notation]
72571
Should I use single or double colon notation for pseudo-elements?
101262
What does "preceding" mean in Oracle?
30873
ls -la symbolics... what does that last symbol mean?
154098
Why does mathematical convention deal so ineptly with multisets?
132590
What is the meaning of single and double underscore before an object name?