17
()⎰---≤10211dx u u p p x p
()⎰--+1011dx u m u p p x x p
()⎰---1011dx u v u p p x x p
⎰⋅+10dx u m p p
⎰+-101dx u p p
()⎰⎰+-⎪⎭⎫ ⎝⎛--=101102214dx u p dx u p p p x p
⎰+10dx mu p p
()⎰--+1011dx u m u p p x x p
()⎰---1011dx u v u p p x x p
()⎰⎰+-⎪⎭⎫ ⎝⎛--=101102214dx u p dx u p p p x p 321I I I +++ 所以 ()32110110221014I I I dx u p dx u p p dx u dt d p x p p +++-⎪⎭⎫ ⎝⎛--≤⎰⎰⎰+ (4.13) 先看1I ,由Young ’s 不等式知 ⎰≤101dx u m p I p (4.14)
()εε11
01C dx u p p +≤⎰+
再看2I
()⎰--≤10121dx u m u p p I x x p ⎰⎰⋅⎪⎪⎭⎫ ⎝⎛=≤--1021221
012p x p x p u u u C dx u u C