Curvature on reductive homogeneous spaces.

Paredes, Marlio; Pinzón, Sofía

Displaying similar documents to “Curvature on reductive homogeneous spaces.”

Nonhomogeneous Riemannian 3-manifolds with distinct constant Ricci eigenvalues

Oldřich Kowalski (1993)

Commentationes Mathematicae Universitatis Carolinae

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We extend a construction by K. Yamato [Ya] to obtain new explicit examples of Riemannian 3-manifolds as in the title. Some of these examples have an interesting geometrical interpretation.

Greedy and lazy representations in negative base systems

Tomáš Hejda, Zuzana Masáková, Edita Pelantová (2013)

Kybernetika

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We consider positional numeration systems with negative real base $- β$ , where $β > 1$ , and study the extremal representations in these systems, called here the greedy and lazy representations. We give algorithms for determination of minimal and maximal $(- β)$ -representation with respect to the alternate order. We also show that both extremal representations can be obtained as representations in the positive base $β^{2}$ with a non-integer alphabet. This enables us to characterize digit sequences admissible...

On amply regular graphs with $b_{1} \leq 5$ .

Nirova, M.S. (2007)

Sibirskie Ehlektronnye Matematicheskie Izvestiya [electronic only]

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Thom polynomials and Schur functions: the singularities $I_{2, 2} (-)$

Piotr Pragacz (2007)

Annales de l’institut Fourier

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We give the Thom polynomials for the singularities $I_{2, 2}$ associated with maps $(ℂ^{•}, 0) \to (ℂ^{• + k}, 0)$ with parameter $k \geq 0$ . Our computations combine the characterization of Thom polynomials via the “method of restriction equations” of Rimanyi et al. with the techniques of Schur functions.