Logical law
From Encyclopedia of Mathematics
in mathematical logic
A logical formula that becomes a true proposition under any interpretation of the variables for propositions and predicates that occur in it. Such formulas are called generally valid, universally valid or tautologies. For example, the tautology $A\lor\neg A$ expresses the law of the excluded middle.
Comments
References
| [a1] | A. Grzegorczyk, "An outline of mathematical logic" , Reidel (1974) |
How to Cite This Entry:
Logical law. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Logical_law&oldid=31440
Logical law. Encyclopedia of Mathematics. URL: http://encyclopediaofmath.org/index.php?title=Logical_law&oldid=31440
This article was adapted from an original article by V.E. Plisko (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article