proof app:A-long-proofs@proof-4

open in the book · appendices/A-long-proofs.tex:1563

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proof : app:A-long-proofs@proof-4prooflemma A.6: LindenbaumA.6definition A.5: Maximal consistentA.5proposition 3.67: Countability of the plane of naturals3.67

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proves Lindenbaum declared appendices/A-long-proofs.tex:1563