Making sense of proof by contradiction
There are certain topics in mathematics where ‘philosophy’ (in the broadest sense) is likely to intrude. Introducing negative or complex numbers is one: is mathematics discovered or invented? Another one is proof by contradiction (or contrapositive, see Kinnear & Sangwin, 2018, for a discussion of the difference).
- Mathematics Education Centre
Published inMathematics in School
Pages32 - 35
PublisherThe Mathematical Association
- VoR (Version of Record)
Rights holder© The Mathematical Association
Publisher statementReproduced with the permission of the publisher.
NotesThis article first appeared in Scottish Mathematical Council Journal 51 (2021), pp. 74-77 and is reprinted in Mathematics in School with the kind permission of the Council.