Books recommendation for Mathematical proofs

[JPSartre]

Hi,
I was wondering if you can suggest good books on the techniques for mathematical proofs.

I know this is quite a simple matter but I would be glad if you could suggest me with greats books for teaching proofs.

More often than not I used the direct method and induction to prove problems in abstract algebra let's say. I am not that familiar yet with indirect methods such as contrapositive or by contradiction method. I need to get better at mastering all proof techniques before next fall.

Thanks in advance for your help,
Best
S

 

[Infinitum]

Recently there was a thread about the same topic

https://www.physicsforums.com/showthread.php?t=609578

 

[JPSartre]

Alright thanks Infinitum!

 

[genericusrnme]

How to Prove it, a Structured Approach - D Vellerman!
You could also check out The Theory of Sets by the Bourbaki group, that book has a section or two on constructing logic and theories. (but this version is a lot harder going than vellermans approach)