Proof in mathematics ('if', 'then' and 'perhaps') : a collection of material illustrating the nature and variety of the idea of proof in mathematics /
Baxandall, P. R.
Brown, W. S.(William S.)
Rose, G. St. C.(Gerald St. C.)
Watson, F. R.(Frank Richard)
Keele : Keele Mathematical Education Publications, Department of Education, Keele University,
c2002.
Previous ed.: Keele : University of Keele, Institute of Education, 1978.
Includes bibliographical references and indexes.
Proof theory.