Mathematical proofs :
Chartrand, Gary.
Mathematical proofs : a transition to advanced mathematics.- 3rd ed. / Gary Chartrand, Albert D. Polimeni, Ping Zhang. - 3rd ed. - Boston : Pearson/Addison Wesley, 2013. - xiii, 400 p. ;
9780321797094
Proof theory--Textbooks.
510.2 / CHA
Mathematical proofs : a transition to advanced mathematics.- 3rd ed. / Gary Chartrand, Albert D. Polimeni, Ping Zhang. - 3rd ed. - Boston : Pearson/Addison Wesley, 2013. - xiii, 400 p. ;
9780321797094
Proof theory--Textbooks.
510.2 / CHA