We consider an open bounded setΩ??nand a family{K(t)}t≥0of orthogonal matrices of?n. SetΩt={x∈?n;x=K(t)y,for all?y∈Ω}, whose boundary isΓt. We denote byQ^the noncylindrical domain given byQ^=∪0展开▼
机译：我们考虑一个开放边界集合Ω?? n和？n正交矩阵的族{K（t）}t≥0。设Ωt= {x∈？n; x = K（t）y，对于所有？y∈Ω}，其边界为Γt。我们用Q ^表示由Q ^ =∪0展开▼
