shivak + combinatorics   18

On a conjecture concerning the sum of independent Rademacher random variables
"It is shown that at least 50% of the probability mass of a sum of independent Rademacher random variables is within one standard deviation from its mean. This lower bound is sharp, it is much better than for instance the bound that can be obtained from application of the Chebishev inequality..."
probability  combinatorics  papers 
january 2012 by shivak
Central Binomial Tail Bounds
"An alternate form for the binomial tail is presented, which leads to a variety of bounds for the central tail. A few can be weakened into the corresponding Chernoff and Slud bounds, which not only demonstrates the quality of the presented bounds, but also provides alternate proofs for the classical bounds."
probability  combinatorics  papers 
january 2012 by shivak
Invitation to Algorithmic Uses of Inclusion-Exclusion
"There are as many odd-sized as even-sized subsets sandwiched between two different sets."
combinatorics  surveys 
november 2011 by shivak
Two new Probability inequalities and Concentration Results
"The usual Azuma's inequality assumes absolute bounds on the Martingale differences. This is often too pessimistic, but seems inherently required in the usual moment-generating function method. We prove a new general inequality based on bounds on moments of Martingale differences rather than absolute bounds; while the method used is elementary, it is quite different from the m-g f method."
deviation_inequalities  combinatorics  papers 
november 2010 by shivak
Combinatorial theorems in sparse random sets
"We develop a new technique that allows us to show in a unified way that many well-known combinatorial theorems, including Tur\'an's theorem, Szemer\'edi's theorem and Ramsey's theorem, hold almost surely inside sparse random sets."
combinatorics  sparsity  papers 
november 2010 by shivak
Aldous/Diaconis: Longest Increasing Subsequences
The techniques taught early on in "Probability Theory and Combinatorial Optimization" apparently go quite far.
teaching  combinatorics 
may 2010 by shivak
Combinatorial Property Testing: Surveys and Works
"Most of the works mentioned below focus on combinatorial properties, and specifically on graph properties. The two standard representations of graphs - by adjacency matrix and by incidence lists - yield two different models for testing graph properties. In the first model graphs, most appropriate for dense graphs, distance between N-vertex graphs is measured as the fraction of edges on which the graphs disagree over N^2. In the second model graphs, most appropriate for bounded-degree graphs, distance between N-vertex d-degree graphs is measured as the fraction of edges on which the graphs disagree over dN."
surveys  property_testing  graph_theory  combinatorics  goldreich  oded 
april 2010 by shivak
Analytic Combinatorics
Free online book by an upcoming seminar speaker. "We develop in about 800 pages the basics of asymptotic enumeration and the analysis of random combinatorial structures through an approach that revolves around generating functions and complex analysis."
books  combinatorics  analysis  mathematics  generating_functions  flajolet  phillipe  sedgewick  robert  filetype:pdf  media:document 
march 2010 by shivak
Beating Bellman for The Knapsack Problem
The coefficient extraction method and its predecessor the constant term method.
combinatorics  algorithms  proof_techniques  lokshtanov  daniel  lipton  richard 
march 2010 by shivak
Statistics of Random Permutations and the Cryptanalysis of Periodic Block Cipher
Ordinary and exponential generating functions are useful for determining the properties of random permutations.
combinatorics  randomness  generating_functions  courtois  nicolas  bard  gregory_v  ault_shaun 
may 2009 by shivak

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