On C1, C2, and weak type-(1,1) estimates for linear elliptic operators

Hongjie Dong, Seick Kim

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


We show that any weak solution to elliptic equations in divergence form is continuously differentiable provided that the modulus of continuity of coefficients in the L1-mean sense satisfies the Dini condition. This in particular answers a question recently raised by Yanyan Li and allows us to improve a result of Haïm Brezis. We also prove a weak type-(1,1) estimate under a stronger assumption on the modulus of continuity. The corresponding results for nondivergence form equations are also established.

Original languageEnglish
Pages (from-to)417-435
Number of pages19
JournalCommunications in Partial Differential Equations
Issue number3
Publication statusPublished - 2017 Mar 4

Bibliographical note

Publisher Copyright:
© 2017 Taylor & Francis.

All Science Journal Classification (ASJC) codes

  • Analysis
  • Applied Mathematics


Dive into the research topics of 'On C1, C2, and weak type-(1,1) estimates for linear elliptic operators'. Together they form a unique fingerprint.

Cite this