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arXiv 2212.03124math.DGmath.AP
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共形不变Lagrange函数临界点的Morse指数稳定性

Morse Index Stability for Critical Points to Conformally invariant Lagrangians

Francesca Da Lio, Matilde Gianocca, Tristan Rivière

摘要:

在弱收敛条件下,证明了一般2维共形不变Lagrange算子的Morse指标和临界点的零性的上半连续性.精确地说,我们建立了从任意闭曲面到任意闭光滑流形的映射的弱收敛临界点到一般共形不变拉格朗日量的任意序列的Morse指标和零性在以下意义下达到极限:它由Morse指数加上弱极限和气泡的零值之和从上渐近有界,而弱极限的Morse指标与泡的Morse指标之和由弱收敛序列的Morse指标自上而下渐近有界.主要结果,然后扩展到的情况下,从序列的域退化到穿孔黎曼表面的映射序列,假设的图像的长度由与此相关的退化的衣领的地图保持低于一些临界长度。

英文摘要:

We prove the upper-semi-continuity of the Morse index plus nullity of critical points to general conformally invariant Lagrangians in dimension 2 under weak convergence. Precisely we establish that the sum of the Morse indices and the nullity of an arbitrary sequence of weakly converging critical points to a general conformally invariant Lagrangians of maps from an arbitrary closed surface into an arbitrary closed smooth manifold passes to the limit in the following sense : it is asymptotically bounded from above by the sum of the Morse indices plus the nullity of the weak limit and the bubbles, while it was well known that the sum of the Morse index of the weak limit with the Morse indices of the bubbles is asymptotically bounded from above by the Morse indices of the weakly converging sequence. The main result is then extended to the case of sequences of maps from sequences of domains degenerating to a punctured Riemann surface assuming that the lengths of the images by the maps of the collars associated to this degeneration stay below some critical length.

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