P. Freitas

activity

19992007

most citedA Li-type criterion for zero-free half-planes of Riemann's zeta function

2 citations · 4 across the 3 of their papers we have counts for

collaborators

Showing 1999Show all

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math.SP1999

On the invariant spectrum of $S^{1}$ -invariant metrics on $S^{2}$

Miguel Abreu, Pedro Freitas

A theorem of J. Hersch (1970) states that for any smooth metric on $S^{2}$ , with total area equal to $4 π$ , the first nonzero eigenvalue of the Laplace operator acting on functions is…

On the invariant spectrum of S1-invariant metrics on S2

On the invariant spectrum of $S^{1}$ -invariant metrics on $S^{2}$