Kazumasa Fujiwara, Vladimir Georgiev. A new class of small initial data which may shift the critical power and lifespan estimates for the classical damped wave equations. Evolution Equations and Control Theory. 2023. 12. 4. 1122-1132
Kazumasa Fujiwara. Note on the lifespan estimate of solutions for non-gauge invariant semilinear massless semirelativistic equations with some scaling critical nonlinearity. Journal of Evolution Equations. 2022. 23. 1
Kazumasa Fujiwara, Masahiro Ikeda, Yuta Wakasugi. On the Cauchy problem for a class of semilinear second order evolution equations with fractional Laplacian and damping. Nonlinear Differential Equations and Applications NoDEA. 2021. 28. 6
藤原和将, Vladimir Georgiev. On global existence of L2 solutions for 1D periodic NLS with quadratic nonlinearity. Journal of Mathematical Physics. 2021. 62. 9. 091504-091504