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15
Math.TechQA.Club
2026-03-25 23:37:04
169
Views
Takeuti's proof of the Second Incompleteness theorem
Published on
25 Mar 2026 - 23:37
#logic
#set-theory
#proof-theory
#incompleteness
147
Views
Hilbert calculi for First-Order Logic
Published on
27 Mar 2026 - 11:08
#logic
#first-order-logic
#proof-theory
#hilbert-calculus
554
Views
Propositional Logic - How to prove that A implies itself?
Published on
23 Feb 2026 - 3:01
#logic
#propositional-calculus
#proof-theory
#hilbert-calculus
92
Views
The take lemma needs a coinductive proof
Published on
25 Mar 2026 - 3:05
#category-theory
#induction
#proof-theory
#coalgebras
#theorem-provers
49
Views
Using recursion theory to show a particular sentence is not provable in an extension of PA.
Published on
26 Mar 2026 - 4:53
#logic
#recursion
#proof-theory
#incompleteness
265
Views
Theorems & proof by contradiction
Published on
31 Dec 2019 - 10:30
#logic
#proof-writing
#propositional-calculus
#proof-theory
126
Views
Proof-theoric ordinal of ETCS
Published on
27 Mar 2026 - 20:14
#category-theory
#set-theory
#ordinals
#proof-theory
#ordinal-analysis
140
Views
self-contained vs. non-self-contained notions of realizability
Published on
26 Mar 2026 - 5:54
#logic
#proof-theory
#constructive-mathematics
90
Views
Removing an Antecedent
Published on
12 Jan 2020 - 0:58
#logic
#proof-theory
114
Views
Kurt Schutte Proof Theory (Theorem 1.5 proof)
Published on
14 Jan 2020 - 1:00
#logic
#proof-theory
127
Views
How many layers of consistency can PA recognize?
Published on
15 Jan 2020 - 14:25
#logic
#proof-theory
95
Views
Infinite ordinals in proof theory
Published on
28 Mar 2026 - 0:02
#soft-question
#intuition
#proof-theory
#ordinal-analysis
95
Views
Term existence property for CZF
Published on
27 Mar 2026 - 7:01
#reference-request
#foundations
#proof-theory
#constructive-mathematics
#alternative-set-theories
136
Views
Calculi for the category theory?
Published on
28 Mar 2026 - 17:08
#calculus
#category-theory
#formal-languages
#proof-theory
#synthetic-differential-geometry
4.1k
Views
What does discharging an assumption mean in Natural Deduction?
Published on
26 Mar 2026 - 4:16
#logic
#proof-theory
#natural-deduction
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