Natural Deduction stuck
37134
How can I solve this logic question using propositional logic (Natural deduction)?
46939
Natural deduction, Proof $\vdash$ $P\Rightarrow(Q\Rightarrow P)$
47135
Prove if a = b, then f(a) = f(b) for any function f (with natural deduction)
147375
Prove :(P → Q) ∨ (Q → P) using natural deduction
158842
What is wrong with this bijection from all naturals to reals between 0 and 1?
135509
Proof writing: how to write a clear induction proof?
5420
Why doesn't Cantor's diagonal argument also apply to natural numbers?
85186
Basic demonstration concerning the natural logarithm...
83037
Applying Zorn's Lemma to natural numbers
141496
Could someone make the proof into a hinted exercise?
82739
Why is $\alpha \rightarrow \forall x(\alpha)$ not generally correct in first-order logic?
49503
Why does the natural quotient metric works in this case?
6535
Proof of for-all / there-exists "negation"?
73683
Proof by induction - Being stuck before being able to prove anything!
152547
Is the sum of all natural numbers countable?
149862
Limit of function with natural logarithm
6638
Solve the equation. e and natural logs