janebrown·4年前·讨论Math.1. How to Prove It: A Structured Approach, Velleman (perfectly prepares for reading of pretty much any math book)2. Higher Algebra and before that Elementary Algebra, Hall (just some intro stuff; general public license, can be freely downloaded from archive.org)
1. How to Prove It: A Structured Approach, Velleman (perfectly prepares for reading of pretty much any math book)
2. Higher Algebra and before that Elementary Algebra, Hall (just some intro stuff; general public license, can be freely downloaded from archive.org)