00638cam a2200193 4500 100355644 TxAuBib 20070420120000.0 090824s2009||||||||||||||||||||||||eng|u 29788 Project Gutenberg PGUSA eng TxAuBib Hadamard, Jacques. Four Lectures on Mathematics Delivered at Columbia University in 1911 [Gutenberg] / by Jacques, 1865-1963 Hadamard. Project Gutenberg, 2009. Project Gutenberg. Freely available. Electronic text. Differential equations. http://www.gutenberg.org/license Rights