广义Young测度与梯度Young测度的刻画
Generalised Young Measures and characterisation of gradient Young Measures
摘要:
给定线性增长函数$f\in C(\mathbb{R}^d)$,给出了表示\begin{equation} \int_Ωf(v_i(z))dμ(z), \end{equation}聚点的一种新方法,其中$μ\in \mathcal{M}^+(Ω)$,$(v_i)_{i\in \mathbb{N}}\subset L^1(Ω,μ)$是范数有界的.我们称这种表示为“广义杨氏测度”。借助新的表示,我们然后通过一组积分不等式,当它们由梯度生成时,即当$v_i = Du_i$为$u_i\in W^{1,1}(Ω,\mathbb{R}^m)$时,我们将这些极限重新定义。
英文摘要:
Given a function $f\in C(\mathbb{R}^d)$ of linear growth, we give a new way of representing accumulation points of \begin{equation} \int_Ωf(v_i(z))dμ(z), \end{equation} where $μ\in \mathcal{M}^+(Ω)$, and $(v_i)_{i\in \mathbb{N}}\subset L^1(Ω,μ)$ is norm bounded. We call such representations "generalised Young Measures". With the help of the new representations, we then characterise these limits when they are generated by gradients, i.e. when $v_i = Du_i$ for $u_i\in W^{1,1}(Ω,\mathbb{R}^m)$, via a set of integral inequalities.
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