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Nov
20
comment “Cayley's theorem” for Lie algebras?
One also needs to take a bit of care about how you've proved PBW. If I remember right, the proof I liked of PBW used that g has a faithful representation.
Jul
20
awarded  Yearling
Apr
3
awarded  Great Answer
Jan
12
awarded  Revival
Jan
1
awarded  Good Answer
Dec
15
awarded  Caucus
Dec
5
comment The degree of antipodal map, composition of reflections?
possible duplicate of The degree of antipodal map.
Nov
13
awarded  Notable Question
Sep
30
awarded  Explainer
Aug
20
reviewed Close gcd and lcm from prime factorization proof
Aug
20
reviewed Close Injective hull of $\mathbb{ Z}_n$
Aug
19
reviewed Close How can i resolve this limit without L'Hopital's Rule?
Aug
19
reviewed Leave Open How does $A_n$ look in Aut$(X)$?
Aug
19
reviewed Close distribution of books among students
Aug
7
comment Is $0.999999999… = 1$?
@Matteo: That's a great way of putting it. Of course it's equivalent to the other definition, but if you only want to talk about infinite decimals you're right that your definition is easier.
Aug
4
reviewed Close Cardinality of the real numbers
Jul
20
awarded  Yearling
May
17
reviewed Reject Is $0.999999999… = 1$?
May
9
awarded  Nice Answer
Mar
10
comment Proving that $\dim(\mathrm{span}({I_n,A,A^2,…})) \leq n$
Now that the typo is sorted out, if you have a math question that you still need answered then you should edit the question to fix the typos and get it reopened.