[gtani]

I think the guy who wrote that original U of C list has stated that it's mainly of historical interest, given the many omissions noted, and that the lists by Baez and Univ. Cambridge that i pushed there are better starting points, or this one: https://www.reddit.com/r/math/wiki/faq

There's lot sof other lists of recommended texts after calc3, https://www.math.ucla.edu/ugrad/courses/math/ and

https://math.berkeley.edu/courses/archives/announcements/fal...

and http://mathoverflow.net/questions/761/undergraduate-level-ma...