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An isomorphic Dvoretzky's theorem for convex bodies

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Gordon Y., Guédon O., Meyer M.

Studia Mathematica

1998

tom 127

nr 2

191-200

We prove that there exist constants C>0 and 0 < λ < 1 so that for all convex bodies K in $ℝ^n$ with non-empty interior and all integers k so that 1 ≤ k ≤ λn/ln(n+1), there exists a k-dimensional affine subspace Y of $ℝ^n$ satisfying $d(Y ∩ K, B_2^k) ≤ C(1+ √(k/ln(n/(kln(n+1))))$. This formulation of Dvoretzky's theorem for large dimensional sections is a generalization with a new proof of the result due to Milman and Schechtman for centrally symmetric convex bodies. A sharper estimate holds for the n-dimensional simplex.

Ograniczanie wyników

1 Studia Mathematica

1 Gordon Y.

1 Guédon O.

1 Meyer M.

1 1998

Wyniki wyszukiwania

An isomorphic Dvoretzky's theorem for convex bodies