Question

Medal for helping me with a (not so) simple question. I'll post it down below

Answer 1

what does that symbol mean?

Answer 2

Depends on context.
I'm willing to bet it means congruence, in this one...

Answer 3

\[\Huge \cong\]

Answer 4

congruence
is congruent to
geometry
△ABC ≅ △DEF means triangle ABC is congruent to (has the same measurements as) triangle DEF.
isomorphic
is isomorphic to
abstract algebra
G ≅ H means that group G is isomorphic (structurally identical) to group H.

(≈ can also be used for isomorphic, as described above.)

Answer 5

http://en.wikipedia.org/wiki/List_of_mathematical_symbols

Answer 6

isomorphism, yeah, that works too :P

Answer 7

Oh thanks!!!