:: Boolean Properties of Sets - Requirements :: by Library Committee :: :: Received April 30, 2002 :: Copyright (c) 2002-2015 Association of Mizar Users
:: This file contains statements which are obvious for Mizar checker if
:: "requirements BOOLE" is included in the environment description
:: of an article. They are published for testing purposes only.
:: Users should use appropriate requirements instead of referencing
:: to these theorems.
:: Statements which cannot be expressed in Mizar language are commented out.
:: "requirements BOOLE" is included in the environment description
:: of an article. They are published for testing purposes only.
:: Users should use appropriate requirements instead of referencing
:: to these theorems.
:: Statements which cannot be expressed in Mizar language are commented out.