outward normal vector meaning in English

外法线矢量

In chapter 3 , 1 consider the nonlinear parabolic equation : where a bounded domain with smooth boundary in ; v is outward normal vector on is a positive function satisfying some compatibility conditions focus my attention on the case of m > 1 , to obtain the blow - up conditions of the positive solution using the method of subsolution and supersolution
运用紧致性原理及moser迭代得到了解的整体存在性和解的熄灭性质。第三章讨论了如下形式的非线性抛物方程：其中m ，， 0 ， r ~ + ，为r ~ n ( n 1 )中的有界域，具有适当光滑的边界( ? ) ； v是(
Then i consider a correlative problem : where m , > 0 , s is a bounded domain with smooth boundary in ; v is outward normal vector on ; f ( s ) is continuous function and satisfies some increasing conditions ; u0 ( x ) is a positive function satisfying some compatibility conditions , to obtain the blow - up conditions of the positive solution using the method of subsolution and supersolution , extend the result of song and zheng
)上的单位外法向； u _ 0 ( x )是正的函数且满足一定的相容性条件：讨论m 1的情况时，在何种条件下使得问题的正解整体存在或是在有限时刻爆破。主要采用上下解的方法来得到结论。随后考虑相关问题：其中m ， 0 ，为r ~ n ( n 1 )中的有界域，具有适当光滑的边界(