…on the previous title, which itself is a play on an Erdös quote) is an olympiad problem book; it might be one of the best in its genre. Oystein Ore has some nice introductory books on number theory (Number Theory and its History) and on graphs (Graphs and their uses); they should be cheap now due to their age, but haven't gotten any less readable. Kvant Selecta by Serge Tabachnikov is a 3(?)-volume series of articles from the…
……Frank Jones 写的《Space》。一本很不错的本科生水平教材，习题直接穿插在正文里而不是放在章末。真后悔当年把书送人了。至于数论，我挺喜欢奥斯汀·欧尔写的《数论及其历史》（Number Theory and its History）。最棒的是它很便宜。作为数论入门极好，我高中的时候就能看懂（我算学得超前的，但绝不是天才），而且学到了很多大学里都从没见过的东西…
…Space" by Frank Jones. A good undergraduate level textbook, problems integrated into the text instead of at the end of the chapter. I wish I hadn't given my copy away now. For number theory I liked "Number Theory and its History" by Oystein Ore. Best part is it is cheap. Good intro to number theory, it was accessible to me in high school (I was advanced, but no genius) and I learned things that I never even encountered in college…
……上一本书的续作，名字本身也是玩了埃尔德什名言的梗）是一本奥数题集；可能是同类书里最好的之一。奥斯汀·欧尔（Oystein Ore）写过几本很棒的数论（《数论及其历史》）和图论（《图及其应用》）入门书；年代久远，现在应该很便宜了，但可读性一点都没打折扣。Serge Tabachnikov 写的《Kvant Selecta》是一套三（？）卷本的合辑，收录的文章来自…
…on the previous title, which itself is a play on an Erdös quote) is an olympiad problem book; it might be one of the best in its genre. Oystein Ore has some nice introductory books on number theory (Number Theory and its History) and on graphs (Graphs and their uses); they should be cheap now due to their age, but haven't gotten any less readable. Kvant Selecta by Serge Tabachnikov is a 3(?)-volume series of articles from the…
……Frank Jones 写的《Space》。一本很不错的本科生水平教材，习题直接穿插在正文里而不是放在章末。真后悔当年把书送人了。至于数论，我挺喜欢奥斯汀·欧尔写的《数论及其历史》（Number Theory and its History）。最棒的是它很便宜。作为数论入门极好，我高中的时候就能看懂（我算学得超前的，但绝不是天才），而且学到了很多大学里都从没见过的东西…
…Space" by Frank Jones. A good undergraduate level textbook, problems integrated into the text instead of at the end of the chapter. I wish I hadn't given my copy away now. For number theory I liked "Number Theory and its History" by Oystein Ore. Best part is it is cheap. Good intro to number theory, it was accessible to me in high school (I was advanced, but no genius) and I learned things that I never even encountered in college…
奥斯汀·欧尔（Øystein Ore）1948年出版的《数论及其历史》（Number Theory and its History）被公认为经典之作。https://www.amazon.com/Number-Theory-History-Dover-Mathemati...
"Number Theory and its History" (1948) by Øystein Ore is considered a classic. https://www.amazon.com/Number-Theory-History-Dover-Mathemati...