ScalingStacks

Example 5.4 . [04E0]

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Example 5.4.

Inside S2​π1×ℝS^{1}_{2\pi}\times\mathbb{R} with the standard Euclidean metric, take LkL_{k} as the graph over S1S^{1} of the function 1k​sin⁡(k​x)\frac{1}{k}\sin(kx). Then LkL_{k} are Lagrangian currents, which converge to S1S^{1} as currents, but due to the high oscillation, lim infM​a​s​s​(Lk)>M​a​s​s​(S1)\liminf Mass(L_{k})>Mass(S^{1}), and LkL_{k} do not converge to S1S^{1} in the varifold sense. The Lagrangian angle of LkL_{k} is prescribed by tan⁡θ=cos⁡(k​x)\tan\theta=\cos(kx), which converges to zero in the current sense, but not strongly in L1L^{1}.

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