https://journal.hep.com.cn/caoms/EN/10.1007/s11401-018-1049-5
On a vector version of a fundamental Lemma of J. L. Lions
Let Ω be a bounded and connected open subset of ℝ N with a Lipschitz-continuous boundary, the set Ω being locally on the same side of ∂Ω. A vector version of a...
on avector versionfundamental lemmalions