A conjecture of Mihail and Vazirani states that the edge expansion of the graph of every $0/1$ polytope is at least one. Any lower bound on the edge expansion gives an upper bound for the mixing time of a random walk on the graph of the polytope. Such random walks are important because they can be used to generate an element from a set of combinatorial objects uniformly at random. A weaker form of the conjecture of Mihail and Vazirani says that the edge expansion of the graph of a $0/1$ polytope in $\mathbb{R}^d$ is greater than 1 over some polynomial function of $d$. This weaker version of the conjecture would suffice for all applications. Our main result is that the edge expansion of the graph of a $\textit{random}$ $0/1$ polytope in $\ma...
The spread of a connected graph G was introduced by Alon, Boppana and Spencer [1], and measures how...
Random geometric graphs result from taking n uniformly distributed points in the unit cube, [0, 1] d...
We study generalisations of a simple, combinatorial proof of a Chernoff bound similar to the one by ...
We present a new approach to showing that random graphs are nearly optimal expanders. This approach ...
We study several problems in extremal combinatorics, random graphs, and asymptotic convex geometry. ...
Random regular graphs play a central role in combinatorics and theoretical computer science. In this...
We solve an open problem concerning the mixing time of symmetric random walk on the ndimensional cub...
<p>This thesis addresses several questions in Ramsey theory and in probabilistic combinatorics. We b...
This thesis addresses several questions in Ramsey theory and in probabilistic combinatorics. We begi...
We study bipartite subgraphs of a random cubic graph in the thesis. We show, that an edge-maximum bi...
We study bipartite subgraphs of a random cubic graph in the thesis. We show, that an edge-maximum bi...
AbstractChoose n random points in Rd, let Pn be their convex hull, and denote by fi(Pn) the number o...
We show that the pivoting process associated with one line and n points in r-dimensional space may n...
AbstractWe investigate important combinatorial and algorithmic properties of Gn,m,p random intersect...
We study generalisations of a simple, combinatorial proof of a Chernoff bound similar to the one by ...
The spread of a connected graph G was introduced by Alon, Boppana and Spencer [1], and measures how...
Random geometric graphs result from taking n uniformly distributed points in the unit cube, [0, 1] d...
We study generalisations of a simple, combinatorial proof of a Chernoff bound similar to the one by ...
We present a new approach to showing that random graphs are nearly optimal expanders. This approach ...
We study several problems in extremal combinatorics, random graphs, and asymptotic convex geometry. ...
Random regular graphs play a central role in combinatorics and theoretical computer science. In this...
We solve an open problem concerning the mixing time of symmetric random walk on the ndimensional cub...
<p>This thesis addresses several questions in Ramsey theory and in probabilistic combinatorics. We b...
This thesis addresses several questions in Ramsey theory and in probabilistic combinatorics. We begi...
We study bipartite subgraphs of a random cubic graph in the thesis. We show, that an edge-maximum bi...
We study bipartite subgraphs of a random cubic graph in the thesis. We show, that an edge-maximum bi...
AbstractChoose n random points in Rd, let Pn be their convex hull, and denote by fi(Pn) the number o...
We show that the pivoting process associated with one line and n points in r-dimensional space may n...
AbstractWe investigate important combinatorial and algorithmic properties of Gn,m,p random intersect...
We study generalisations of a simple, combinatorial proof of a Chernoff bound similar to the one by ...
The spread of a connected graph G was introduced by Alon, Boppana and Spencer [1], and measures how...
Random geometric graphs result from taking n uniformly distributed points in the unit cube, [0, 1] d...
We study generalisations of a simple, combinatorial proof of a Chernoff bound similar to the one by ...