Proof for $ \vdash Q \rightarrow (P \rightarrow Q) $ in symbolic logic.
35236
Proof $p \vdash q \Rightarrow p$
106401
Prove: $p-mq | f(m)$ where $m$ is any integer
41044
Equivalence of $a \rightarrow b$ and $\lnot a \vee b$
20581
How to show that $\Gamma\vdash (\varphi\to\neg\varphi)\to\varphi$?
10540
Prove $\vdash \neg(\square F\land p)$ in $KD$
87928
Proof of logical equivalence of biconditional and other proposition
83475
Prove Or Disprove: tr(AB)=tr(A)*tr(B)
50266
In the following figure prove that: $AK||BC$
46613
What's the difference between $\equiv$ and $\leftrightarrow$ in a formal proof?
79407
How to solve ~(P → Q) : P & ~Q by natural deduction?
135422
$\operatorname{Hom}(-,A) \cong \operatorname{Hom}(-,A') \Rightarrow A \cong A'$, proof verification
88104
Prove "$(p \lor q) \land (\neg p \lor r)) \rightarrow (q \lor r)$" is a tautology
56878
Proof that $a\mid b \land b\mid c \Rightarrow a\mid c $
48213
proving logical equivalence $(P \leftrightarrow Q) \equiv (P \wedge Q) \vee (\neg P \wedge \neg Q)$
18140
When does $\,n\mid q^3 \Rightarrow n\mid q\,$?
47161
Quick logic question about $P\leftrightarrow Q$, terminology
15504
In classical logic, why is $(p\Rightarrow q)$ True if $p$ is False and $q$ is True?