What does the symbol $\Subset$ mean?
51434
What does the symbol $\subset\subset$ mean?
52473
How do you make a square element symbol (\in), to show that an element belongs to a collection of set?
120556
What does `` mean in Python?
141318
$\subset$ vs $\subseteq$ when *not* referring to strict inclusion
107056
Notation for Subspaces
40234
What does $\ll$ mean?
3101
Meaning of a set in the exponent
44004
Quick question about subsetting via character-class
56945
What does the math notation $\sum$ mean?
36612
Strange set notation (a set as a power of 2)?
111595
What does this sign exactly mean? |=
113566
\subseteq + \circ as a single symbol ("open subset")
17212
The preimage of a subset
141991
What does the notation $S^n$ mean?
97951
Is the void set (∅) a proper subset of every set?
64344
Notation question: $\ll$
10472
Is every set a subset?