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Intuitionistic Free Abelian Groups
Author(s) -
van Dalen D.,
De Vries F. J.
Publication year - 1988
Publication title -
mathematical logic quarterly
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.473
H-Index - 28
eISSN - 1521-3870
pISSN - 0942-5616
DOI - 10.1002/malq.19880340102
Subject(s) - abelian group , mathematics , physics , combinatorics
Our construction is purely internal and uses no specific intuitionistic or constructive principles, hence it entails the existence of free abelian groups in all topoi with a natural number object.