collaborators

5 papers

math.AP2026

Norm inflation for quadratic derivative fractional nonlinear Schrödinger equations

Toshiki Kondo, Mamoru Okamoto

We consider the Cauchy problem for quadratic derivative fractional nonlinear Schrödinger equations on or . We determine the sharp exponents of the fractio…

math.AP2025

Well- and Ill-posedness of the Cauchy problem for derivative fractional nonlinear Schrödinger equations on the torus

Takamori Kato, Toshiki Kondo, Mamoru Okamoto

We consider the Cauchy problem for derivative fractional Schrödinger equations (fNLS) on the torus . Recently, the second and third authors established a necessary and…

math.AP2025

Well-posedness and ill-posedness for a system of periodic quadratic derivative nonlinear Schrödinger equations

Hiroyuki Hirayama, Shinya Kinoshita, Mamoru Okamoto

We consider the Cauchy problem of a system of quadratic derivative nonlinear Schrödinger equations which was introduced by M. Colin and T. Colin (2004) as a model of laser-plasma…

math.AP2025

Global well-posedness of the energy-critical stochastic nonlinear Schrödinger equation on the three-dimensional torus

Guopeng Li, Mamoru Okamoto, Liying Tao

We study the Cauchy problem of the defocusing energy-critical stochastic nonlinear Schrödinger equation (SNLS) on the three dimensional torus, forced by an additive noise. We adap…

math.AP2025

Well- and ill-posedness of the Cauchy problem for semi-linear Schrödinger equations on the torus

Toshiki Kondo, Mamoru Okamoto

We consider the Cauchy problem for semi-linear Schrödinger equations on the torus . We establish a necessary and sufficient condition on the polynomial nonlinearity for…