Book of Proof
Putter King Education - Math (Level 3)
ตรรกศาสตร์และการพิสูจน์
Discussion #12 1/22 Discussion #12 Deduction, Proofs and Proof Techniques.
CPSC 121: Models of Computation Unit 7: Proof Techniques Based on slides by Patrice Belleville and Steve Wolfman.