Proving that a Jordan basis is not uniquely determined.
15109
Jordan basis unique?
35874
Show that when $BA = I$, the solution of $Ax=b$ is unique
57649
Prove that for every $f$, a bilinear form, there exists a basis ${v_1,...,v_n}$ so that $f(v_i,v_j) = -f(v_j,v_i)$
120766
Prove ${y_n}$ is a basis for a Hilbert space $H$.
5506
Perturbation property of Orthonormal basis for Hilbert space
153069
Proof for Unique Factorization Domain
64130
Prove that $\mathbb{Q}^{\times}$ not isomorphic to $\mathbb{Z}^{n}$
77160
How to prove the cosets are distinct?
67383
Prove that $G'$ is not planar.
116823
VERIFYING: Proving an $n \times n$ Matrix Vector Space
8970
Proving the cross product matrix tranformation identity with an alternative solution
76110
Proving that the zero vector is unique
83116
Uncountability of basis of $\mathbb R^{\mathbb N}$
95764
Prove that the additive groups $\mathbb{Z}$ and $\mathbb{Q}$ are not isomorphic.
69046
Proof of $\mathbb{Q}$ is not cyclic
145447
bilinear form - proof
130268
How to prove that a nilpotent matrix is not invertible?