A counter-example concerning maximal estimates for solutions to equations of Schrodinger type Per Sjolin 42B2535Q40Schrodinger type equationsmaximal estimates Indiana University Mathematics Journal 1998 text pdf 10.1512/iumj.1998.47.1560 10.1512/iumj.1998.47.1560 en Indiana Univ. Math. J. 47 (1998) 593 - 600 state-of-the-art mathematics http://iumj.org/access/