Opening the Maslov Box for Traveling Waves in Skew-Gradient Systems: Counting Eigenvalues and Proving (In)Stability Paul Cornwell Indiana University Mathematics Journal 2019 text pdf 10.1512/iumj.2019.68.7831 10.1512/iumj.2019.68.7831 en Indiana Univ. Math. J. 68 (2019) 1801 - 1832 state-of-the-art mathematics http://iumj.org/access/