The Classical Maximum Principle
The Classical Maximum Principle
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经典极大值原理
DOI:
10.1007/978-3-642-61798-0_3
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发表时间:
1977
期刊:
影响因子:
--
通讯作者:
N. Trudinger
中科院分区:
文献类型:
--
作者:
D. Gilbarg;N. Trudinger
The purpose of this chapter is to extend the classical maximum principles for the Laplace operator, derived in Chapter2, to linear elliptic differential operators of the form $$Lu \equiv {a^{ij}}\left( x \right){D_{ij}}u + {b^i}\left( x \right){D_i}u + c\left( x \right)u,\quad {a^{ij}} = {a^{ji}},$$ wherex= (x1, … ,xn) lies in a domain Ω of ℝn,n⩾ 2. It will be assumed, unless otherwise stated, thatubelongs toC2(Ω). The summation convention that repeated indices indicate summation from 1 tonis followed here as it will be throughout.Lwill always denote the operator (3.1).