Direct proof of non-commuting loops of figure-eight?
55281
Why is the fundamental group of the plane with two holes non-abelian?
140199
Proof that disjoint cycles commute
24131
How to visualise the derived series of the Lie algebra $\mathfrak{u}(n,\mathbb{C})$?
136202
Is a loop in $X$ based at $a\in X$ homotopic to its reverse loop?
89164
When is the graph of the divisor relation on $[n]$ planar?
39096
Primitive elements of GF(8)
5540
Why aren't these loops homotopic?
65636
Transpose of fermion bilinears
85193
direct product commutes with tensor product?
65873
A proof for Atiyah-Macdonald Exercise I.21.iii
20659
Is trace invariant under cyclic permutation with rectangular matrices?
126561
Proof of equivalence of algebraic and geometric dot product?
87922
Computing the Lie bracket on the Lie group $GL(n, \mathbb{R})$
19026
What do all the $k$-cycles in $S_n$ generate?
85332
Is $\mathbb{R}^4$ minus a line simply connected?
158364
Are there uncountably many $A\in M_3 (\mathbb {R})$ such that $A^8=I $?
141010
Computing $n$-th external power of standard simplectic form