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## Generalized Lawson Tori and Klein Bottles

Journal of Geometric Analysis. 2015. Vol. 25. No. 4. P. 2645-2666.

Using Takahashi's theorem, we propose an approach to extend known families of minimal tori in spheres. As an example, the well-known two-parametric family of Lawson tau-surfaces including tori and Klein bottles is extended to a three-parametric family of tori and Klein bottles minimally immersed in spheres. Extremal spectral properties of the metrics on these surfaces are investigated. These metrics include (i) both metrics extremal for the first non-trivial eigenvalue on the torus, i.e., the metric on the Clifford torus and the metric on the equilateral torus and (ii) the metric maximal for the first non-trivial eigenvalue on the Klein bottle.