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[SOLVED] Is a smooth closed surface in Euclidean 3-space rigid?

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Forcing with c.c.c forcing notions, Cohen reals and Random reals

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[SOLVED] Shortest closed curve to inspect a sphere

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[SOLVED] Are there Ricci-flat riemannian manifolds with generic holonomy?

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Which region in the plane with a given area has the most domino tilings?