We study the partial regularity of suitable weak solutions to the three dimensional incompressible Navier–Stokes equations. There have been several attempts to refine the Caffarelli–Kohn–Nirenberg criterion (1982). We present an improved version of the CKN criterion with a direct method, which also provides the quantitative relation in Seregin’s criterion (2007).
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Acknowledgements H. J. Choe has been supported by the National Reserch Foundation of Korea (NRF) grant, funded by the Korea government (MSIP) (No. 20151009350). J. Wolf has been supported by the German Research Foundation (DFG) through the project WO1988/1-1; 612414. M. Yang has been supported by the National Research Foundation of Korea(NRF) Grant funded by the Korea government (MSIP) (No. 2016R1C1B2015731).
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