Reika Fukuizumi

Besov spaces associated with the harmonic oscillator

Abstract The Besov space associated with the harmonic oscillator is introduced and thoroughly explored in this paper. It provides a comprehensive summary of the fundamental concepts of the Besov spaces, their embedding properties, bilinear estimates, and related topics.

Renormalization of a 1d quadratic Schrödinger model with additive noise

The study is devoted to the interpretation and well-posedness of the stochastic NLS model (ı∂t−Δ)u=|u|2+B˙,u0=0,t∈R,x∈T, where B˙ stands for a space-time fractional noise with index H=(H0,H1) in a subset of (0,1)2. We first establish that in the situation where 0<2H0+H1≤2, the eq...