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This note gives an explicit lower bound of the function ψ(t) in the lemma of DiPerna and Chen and some remarks.
ON A LEMMA OF DIPERNA AND CHEN
【摘 要】
：
This note gives an explicit lower bound of the function ψ(t) in the lemma of DiPerna and Chen and some remarks.
【机 构】
：
Institute of Applied Mathematics
【出 处】
：
数学物理学报（英文版）
【发表日期】
：
2004年期
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