WebProve the following special case of the modular Ray-Chaudhuri-Wilson Theorem (with a slightly weaker conclusion, which is still good enough for Borsuk’s problem): Let p be a prime, and let F ⊆ [n] 2p−1 be such that A∩ B 6= p−1 for any A,B ∈ F. Then F ≤ n 0 + n 1 +...+ n p−1 . Hint. Webthe one hand use the Ray-Chaudhuri – Wilson Theorem, and on the other use Frankl and Wilson’s modular version of the Ray-Chaudhuri – Wilson Theorem. Do: Prove that if n …

(PDF) A new short proof of the EKR theorem - Academia.edu

WebRemark. The Frankl-Wilson Theorem also holds if pis replaced by a prime power. Amazingly, it is false when pis replaced by a product of at least two distinct primes, e.g. 6. (Grolmusz, 2000.) This indicates that the phenomenon is ‘genuinely’ a number-theoretic / algebraic one, not just a combinatorial one. Corollary 5 (Ray-Chaudhury-Wilson). WebDec 17, 2015 · Our main result is a new upper bound for the size of k-uniform, L-intersecting families of sets, where L contains only positive integers. We characterize extremal … sims 3 island paradise scuba diving

Multilinear Polynomials and Frankl-Ray-Chaudhuri-Wilson Type

WebIn another landmark paper, P. Frankl and R. M. Wilson derived (among a host of results) a nonuniform version of Theorem 1. Theorem 2 (Nonuniform Ray-Chaudhuri--Wilson inequality). (Frankl, Wilson [5].) If ,q~ is an L-intersecting family of subsets of a set of n elements, where ILl=s, then WebThe celebrated Frankl--Ray-Chaudhuri--Wilson theorems give tight bounds on the size of an L-intersecting set system on a ground set of size n. Such a system contains at most $\binom{n}{s}$ sets if it is uniform and at most $\sum_{i=0}^s \binom{n}{i}$ sets if it is nonuniform. They also prove modular versions of these results. WebTour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site sims 3 island paradise traits