01167nas a2200217 4500008004100000022001400041245008300055210006900138300001400207490000700221520048300228653002500711653001800736653002400754653000800778653003100786653002200817100001900839700002000858856007100878 2019 eng d a0294-144900aLocal well-posedness for quasi-linear NLS with large Cauchy data on the circle0 aLocal wellposedness for quasilinear NLS with large Cauchy data o a119 - 1640 v363 a
We prove local in time well-posedness for a large class of quasilinear Hamiltonian, or parity preserving, Schrödinger equations on the circle. After a paralinearization of the equation, we perform several paradifferential changes of coordinates in order to transform the system into a paradifferential one with symbols which, at the positive order, are constant and purely imaginary. This allows to obtain a priori energy estimates on the Sobolev norms of the solutions.
10aDispersive equations10aEnergy method10aLocal wellposedness10aNLS10aPara-differential calculus10aQuasi-linear PDEs1 aFeola, Roberto1 aIandoli, Felice uhttp://www.sciencedirect.com/science/article/pii/S0294144918300428