Introduction to Optimization and Semidifferential Calculus (MPS-SIAM Series on Optimization) by Michael C. Delfour English | 2012 | ISBN: 1611972140 | 363 pages | PDF | 3 MB
Mathematical analysis: An introduction to functions of several variables By Mariano Giaquinta, Giuseppe Modica (auth.) 2009 | 348 Pages | ISBN: 0817645098 | PDF | 4 MB