Elliptic equations with singular BMO coefficients in reifenberg domains
Elliptic equations with singular BMO coefficients in reifenberg domains
$W^{1, p}$ estimate for the solutions of elliptic equations whose coefficient matrix can have large jump along the boundary of subdomains is obtained. The principal coefficients are supposed to be in the John-Nirenberg space with small BMO seminorms. The domain and subdomains are Reifenberg flat domains and moreover, it has …