doubly degenerate meaning in Chinese

二度简并
二重简并

Extinction of solutions for the nonlinear doubly degenerate parabolic equation with a gradient term
带梯度项的非线性双重退缩抛物方程解的耗竭
Existence of solutions to a class of doubly degenerate equations and blow up with vanishing initial energy
一类双重退化抛物方程解的存在性及零初始能量下的爆破
The existence and uniqueness of renormalized solutions of a doubly degenerate parabolic equation are discussed by means of parabolic regularization method
摘要利用抛物正则化方法证明了双重退化抛物型方程重整化解的存在惟一性。