I'm a rising sophomore at Cal planning to major in applied math and trying to finalize my Fall 2015 schedule. As of the end of this summer, I'll have taken Math 1B, 53, and 54. I intend to take my first upper div math class this fall and then take 55 Spring 2016 and declare the major. I originally wanted to take 110 with Holtz, but I later saw that many reviews of her were less than stellar. I'm currently signed up to take 113 with Mann. I'm having some second thoughts as I've heard 113 is really theoretical and proof-heavy, which concerns me given that I have yet to take 55. My other choice is 126 (PDE) with Calder, since I've heard PDE is a more concrete application and extension of material from 53 and 54. I'm leaning towards 113 since Mann has excellent reviews and I'm good friends with another sophomore taking the class this fall, so I figured we could help each other out. Any advice would be greatly appreciated!