## Abstract

We obtain the existence, uniqueness, and regularity estimates of the following Cauchy problem {∂tu(t,x)=ψ(t,-i∇)u(t,x)+f(t,x),(t,x)∈(0,T)×Rd,u(0,x)=0,x∈Rd, in (Muckenhoupt) weighted L_{p} -spaces with time-measurable pseudo-differential operators ψ(t,-i∇)u(t,x):=F-1[ψ(t,·)F[u](t,·)](x). More precisely, we find sufficient conditions of the symbol ψ(t, ξ) (especially depending on the smoothness of the symbol with respect to ξ) to guarantee that equation (0.1) is well-posed in (Muckenhoupt) weighted L_{p} -spaces. Here the symbol ψ(t, ξ) is merely measurable with respect to t, and the sufficient smoothness of ψ(t, ξ) with respect to ξ is characterized by a property of each weight. In particular, we prove the existence of a positive constant N such that for any solution u to equation (0.1), ∫0T∫Rd|(-Δ)γ/2u(t,x)|p(t2+|x|2)α/2dxdt≤N∫0T∫Rd|f(t,x)|p(t2+|x|2)α/2dxdt and ∫0T(∫Rd|(-Δ)γ/2u(t,x)|p|x|α2dx)q/ptα1dt≤N∫0T(∫Rd|f(t,x)|p|x|α2dx)q/ptα1dt, where p, q∈ (1 , ∞) , - d- 1 < α< (d+ 1) (p- 1) , - 1 < α_{1}< q- 1 , - d< α_{2}< d(p- 1) , and γ is the order of the operator ψ(t, - i∇) .

Original language | English |
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Article number | 55 |

Journal | Journal of Pseudo-Differential Operators and Applications |

Volume | 14 |

Issue number | 4 |

DOIs | |

Publication status | Published - 2023 Dec |

### Bibliographical note

Funding Information:The authors were supported by the National Research Foundation of Korea(NRF) grant funded by the Korea government(MSIT) (No.2020R1A2C1A01003959).

Publisher Copyright:

© 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

## Keywords

- Cauchy problem
- Muckenhoupt weight
- Pseudo-differential operator

## ASJC Scopus subject areas

- Analysis
- Applied Mathematics

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