We prove that the following endpoint Kato-Ponce inequality holds: parallel to D-s (fg)parallel to (L) (q/q+1(Rn)) less than or similar to parallel to D-s f parallel to(L1(Rn))parallel to g parallel to(Lq(Rn)) +||f parallel to(L1(Rn))parallel to D(s)g parallel to(Lq(Rn)), for all 1 <= q <= infinity, provided s > n/q or s is an element of 2N. Endpoint estimates for several variants of Kato-Ponce inequality in mixed norm Lebesgue spaces are also presented. Our results complement and improve some existing results.
机构:
Hong Kong Univ Sci & Technol, Dept Math, Kowloon, Clear Water Bay, Hong Kong, Peoples R ChinaHong Kong Univ Sci & Technol, Dept Math, Kowloon, Clear Water Bay, Hong Kong, Peoples R China