On cross-intersecting uniform sub-families of hereditary families.

Borg, Peter

Displaying similar documents to “On cross-intersecting uniform sub-families of hereditary families.”

Necessary and sufficient conditions for a system of eigenfunctions and associated functions of a Sturm-Liouville operator with discontinuous coefficients to possess the basis property.

Lažetić, Nebojša L. (1985)

Publications de l'Institut Mathématique. Nouvelle Série

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A remark on polyconvex envelopes of radially symmetric functions in dimension $2 \times 2$

Ondřej Došlý (1997)

Applications of Mathematics

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We study polyconvex envelopes of a class of functions related to the function of Kohn and Strang introduced in . We present an example of a function of this class for which the polyconvex envelope may be computed explicitly and we also point out some general features of the problem.

Two-dimensional real symmetric spaces with maximal projection constant

Bruce Chalmers, Grzegorz Lewicki (2000)

Annales Polonici Mathematici

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Let V be a two-dimensional real symmetric space with unit ball having 8n extreme points. Let λ(V) denote the absolute projection constant of V. We show that $λ (V) \leq λ (V_{n})$ where $V_{n}$ is the space whose ball is a regular 8n-polygon. Also we reprove a result of [1] and [5] which states that $4 / π = λ (l ₂^{(2)}) \geq λ (V)$ for any two-dimensional real symmetric space V.

Carleman estimates for a subelliptic operator and unique continuation

Nicola Garofalo, Zhongwei Shen (1994)

Annales de l'institut Fourier

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We establish a Carleman type inequality for the subelliptic operator $ℒ = Δ_{z} + | x |^{2} \partial_{t}^{2}$ in $ℝ^{n + 1}$ , $n \geq 2$ , where $z \in ℝ^{n}$ , $t \in ℝ$ . As a consequence, we show that $- ℒ + V$ has the strong unique continuation property at points of the degeneracy manifold ${(0, t) \in ℝ^{n + 1} | t \in ℝ}$ if the potential $V$ is locally in certain $L^{p}$ spaces.

The centroid and circumcentre of a plane convex set

H. G. Eggleston (1969)

Compositio Mathematica

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Linked Darboux motions.

Röschel, Otto (1996)

Mathematica Pannonica

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On isotropic tensors

H. Fath el Bab (1977)

Czechoslovak Mathematical Journal

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Displaying similar documents to “On cross-intersecting uniform sub-families of hereditary families.”

Necessary and sufficient conditions for a system of eigenfunctions and associated functions of a Sturm-Liouville operator with discontinuous coefficients to possess the basis property.

A remark on polyconvex envelopes of radially symmetric functions in dimension 2 × 2

Two-dimensional real symmetric spaces with maximal projection constant

Carleman estimates for a subelliptic operator and unique continuation

The centroid and circumcentre of a plane convex set

Linked Darboux motions.

On isotropic tensors

A remark on polyconvex envelopes of radially symmetric functions in dimension $2 \times 2$