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2h
revised Irreducibility of a character if and only if inner product equals 1
added 201 characters in body
2h
answered Irreducibility of a character if and only if inner product equals 1
1d
revised X and Y be finite sets and f: X->Y be a function.
added 415 characters in body
1d
answered X and Y be finite sets and f: X->Y be a function.
2d
reviewed Edit Solving an equation $x^{22}\equiv2 \bmod 23$
2d
revised Solving an equation $x^{22}\equiv2 \bmod 23$
corrected spelling
2d
revised Integration of $\displaystyle \frac{e^x-1}{e^x+1}$ w.r.t. $x$
added 11 characters in body; edited title
Aug
28
comment Finding the order of permutations in $S_8$
@RudytheReindeer: Thanks. I don't mind at all.
Aug
27
comment Show that a one dimensional $\mathfrak {g}\!-\!\operatorname{module}$ is irreducible
@LieAlgebra: Yes, a Lie algebra module is a vector space. And this vector space has a basis.
Aug
27
answered Show that a one dimensional $\mathfrak {g}\!-\!\operatorname{module}$ is irreducible
Aug
22
revised Solving $x^{2n} = \frac{1}{2^n}$ for $x$
edited title
Aug
22
reviewed Approve Solving $x^{2n} = \frac{1}{2^n}$ for $x$
Aug
22
revised In algebraic topology, for a function $f$ what does $f _\ast$ mean?
added 12 characters in body
Aug
21
revised In algebraic topology, for a function $f$ what does $f _\ast$ mean?
added 223 characters in body
Aug
21
comment In algebraic topology, for a function $f$ what does $f _\ast$ mean?
@JohnH.: Yes, basically. The [] comes from the fact that we are talking about equivalence classes. Let me update the answer a bit on this.
Aug
21
revised In algebraic topology, for a function $f$ what does $f _\ast$ mean?
added 177 characters in body
Aug
21
answered In algebraic topology, for a function $f$ what does $f _\ast$ mean?
Aug
14
reviewed Close Is it true that any surjective group homomorphism from $SL_n(\mathbb Z)$ to itself is bijective ?
Aug
12
comment Prove no real number satisfies $x^{2} = -1$
Why the downvote?
Jul
31
answered How to discover other fields of mathematics?