DM 2008 | Sciweavers

Some important properties of the chromatic polynomial also hold for any polynomial set map satisfying pS(x + y) = TU=S pT (x)pU (y). Using umbral calculus, we give a formula for t...

Gus Wiseman

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2008

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On diameter perfect constant-weight ternary codes

13 years 3 months ago

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Denis S. Krotov

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2008

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Perfect Skolem sets

13 years 3 months ago

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A Skolem sequence is a sequence s1, s2, . . . , s2n (where si A = {1 . . . n}), each si occurs exactly twice in the sequence and the two occurrences are exactly si positions apar...

Gustav Nordh

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2010

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On the combinatorics of Galois numbers

13 years 3 months ago

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Steffen Hitzemann, Winfried Hochstättler

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2010

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Walking in circles

13 years 3 months ago

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We show that for every x1, . . . , xn, y1, . . . , yn ∈ S1 there exists i ∈ {1, . . . , n} such that n k=1 d(xi, xk) ≤ n k=1 d(xi, yk), where S1 is the unit circle and d is ...

Noga Alon, Michal Feldman, Ariel D. Procaccia, Mos...

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2010

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Finite geometry and the Gale transform

13 years 3 months ago

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Antonio Cossidente, Angelo Sonnino

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2010

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The hyperplanes of DQ-(7, k) arising from embedding

13 years 3 months ago

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We determine all hyperplanes of the dual polar space DQ−(7, K) which arise from embedding. This extends one of the results of [5] to the inﬁnite case.

Bart De Bruyn

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Brick partitions of graphs

13 years 3 months ago