linear trasformations $A\colon f\to \phi*f$
118134
If $\psi h$ is in $L^2$ for all $h\in L^2$, must $\psi$ be essentially bounded?
132532
Things around $(\forall x)(\Psi \Rightarrow \Phi) \Leftrightarrow ((\exists z)\Psi) \Rightarrow \Phi)$
60306
Natural class of functions whose $\mathcal O$-sets are linearly ordered
7890
Prove the map $\Phi:G\to\operatorname{Aut}G$ with $g\mapsto (x\mapsto g^{-1}xg)$ is an homomorphism.
45179
When does the isomorphism $G\simeq \ker(\phi)\times \operatorname{im}(\phi)$? hold?
113326
Proving orthogonality of vectors in a complex vector space
87451
Construction of matrices under ZFC axioms
48291
Proof that $\mathrm{ker}(f^*) = \mathrm{im}(f)^{\perp} $
117131
Canonical Isomorphism Between $\mathbf{V}$ and $(\mathbf{V}^*)^*$
121732
Functional completeness of $\{\text{or},\text{ xor}, \text{ xnor}\}$
112024
Let $T:V → V$ be a linear transformation where $V$ is finite dimensional.
125966
Why there's a finite $\Gamma '$ such that $\Gamma ' \vDash \varphi$?
48990
Linear map $f:V\rightarrow V$ injective $\Longleftrightarrow$ surjective
62887
Proof that a linear transformation is continuous
128229
Proving that the transformation obtained from an adjoint pair is natural
150385
The use of the Axiom of Choice in this proof of the sequence lemma
127882
Proofs involving orthonormal basis