Remark on the analytic smoothing for the Schrodinger equation Y. MorimotoL. RobbianoC. Zuily 35J1035B6558G17smoothing effectSchrodinger equationsmoothnessGevreyvariable coefficients Indiana University Mathematics Journal 2000 text pdf 10.1512/iumj.2000.49.1805 10.1512/iumj.2000.49.1805 en Indiana Univ. Math. J. 49 (2000) 1563 - 1580 state-of-the-art mathematics http://iumj.org/access/