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Metamath

Known as: Metamath.org, Metamath program, Metamath Proof Explorer 
Metamath is a language for developing strictly formalized mathematical definitions and proofs accompanied by a proof checker for this language and a… 
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Papers overview

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2018
2018
We evaluate six conjectures and one theorem, as proffered by Metamath staff. The conjectures are not tautologous. The Tarski… 
2017
2017
By a pure logical framework we mean a framework which does not rely on any particular formal calculus. For example, Metamath is… 
2016
2016
Although some work has been done on the metamathematics of Metamath, there has not been a clear definition of a model for a… 
2015
2015
We present the formalization of Specker's "local" version of the claim that the Generalized Continuum Hypothesis implies the… 
2015
2015
Unlike some other formal systems, the proof system Metamath has no built-in concept of "decimal number" in the sense that… 
2015
2015
Unlike some other formal systems, the proof system Metamath has no built-in concept of “decimal number” in the sense that… 
2012
2012
Metamath is a formal proof verifier designed and implemented by Norman Megill. He has also formalized many mathematical proofs in… 
1996
1996
Proof Ground Proof 1 OCONS (1) 11 OCONS (11) 2 ` d (2) 8>>>>><>>>>>: 12 ` all(x; diag(x)) (12) 3 ` all(x; diag(x)) ^ SUBST…