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# Questions

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### Is there a harmonic function on $M = R \times {}_{{e^{2t}}}N$

apr 4 at 13:20 jiangsaiyin 3075

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80
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### How to compute the first eigenvalue of $M = R \times {}_{\cosh t}N$

jan 27 at 6:03 jiangsaiyin 3075

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62
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### How to compute the first eigenvalue of $M = R{ \times _{\cosh t}}{S^2}\left( {\frac{1}{2}} \right)$

jan 28 at 13:41 jiangsaiyin 3075

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136
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### classification of non-compact Riemannian manifold with Ric>=-(n-1),and first eigenvalue λ=(n-1)^2/4

jan 21 at 19:13 Mohan Ramachandran 1,17658

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154
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### What does a singular simplex with real coefficient mean [closed]

1d ago David Cohen 45618

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25
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### curvature of cone over a cuboid bounded below?

apr 27 at 4:27 jiangsaiyin 3075

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109
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### Only finitely many fundamental groups in $M(n,k,v,D)$?

apr 18 at 18:42 Neil Strickland 13.5k12866

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42
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### homotopy from a lipschitz map on the boundary to a lip map

apr 22 at 4:08 jiangsaiyin 3075

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87
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### Must a hyperbolic cone over Riemannian manifold be manifold?

feb 25 at 9:28 jiangsaiyin 3075

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