نتایج جستجو برای: eric hirsch
تعداد نتایج: 8961 فیلتر نتایج به سال:
W.M. Hirsch formulated a beautiful conjecture on amaximum of diameters of convex polyhedrawith both fixed dimension and number of facets. This is still unsolved for about 50 years. Here, I suggest a new method of argument from the viewpoint of deformation of polytope. As a candidate of the clue to the complete-proof, there’s some conjectures which are all sufficient for the original problem.
This article compares the relative merits of feasibility and cost-benefit based regulation, responding to a recent article by Jonathan Masur and Eric Posner on this topic. Normatively, it shows that the lack of correlation between non-subsistence consumption and welfare supports the argument that regulation should be strict, unless widespread plant shutdowns, which would seriously impact well-b...
The aim of this study was to evaluate the Enterobacterial Repetitive Intergenic Consensus (ERIC-PCR) as a tool for molecular typing of C. pseudotuberculosis isolates from eight different hosts in twelve countries. Ninety-nine C. pseudotuberculosis field strains, one type strain (ATCC 19410T) and one vaccine strain (1002) were fingerprinted using the ERIC-1R and ERIC-2 primers, and the ERIC-1R+E...
We prove that the equilibria of a large interdependent-value, uniform-price auction model where bidders have arbitrary preferences for multiple units can be approximated by a nonatomic exchange economy. We show that the uniform-price auction is approximately efficient with a large number of participants and asymptotically aggregates idiosyncratic bidder information into the market price. More g...
In 1957, Hirsch conjectured that every d−polytopes with n facets has edge-diameter at most n − d. Recently Holt and Klee constructed polytopes which meet this bound for a number of (d, n) pairs with d ≤ 13 and for all pairs (14, n). The main purpose of this paper is to present linear Hirsch bound ⌊ 2 ⌋+ d− 2 for all pairs (d, n) and to review mathematical ideas behind simplex methods, investiga...
T he field of asymmetric catalysis is dedicated to the development of efficient catalytic methods for the construction of chiral molecules and has been dominated by the use of organometallics and enzymes for most of its history. However, in the past decade, the concept of organocatalysis has emerged as a discrete strategy for addressing modern day challenges in chemistry. It has become widely a...
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