منابع مشابه
The Horvitz-Thompson Estimator
The Horvitz-Thompson estimator is a general estimator for a population total, which can be used for any probability sampling plan. This includes both sampling with and without replacement. • Let π i be the probability that the i th unit of the population is included in the sample (inclusion probability). • On each unit i, we measure a response y i , and typically seek to estimate: τ = N i=1 y i...
متن کاملWillard Thompson
Complexity theory has a profound influence on the field of cryptology. The time complexity of breaking a cipher system must be significant enough to thwart any adversary from succeeding. However, with the emergence of quantum computers an adversary may have no difficulty in breaking known cipher systems. If quantum computers would exist today new mechanisms for security would need to be built. ...
متن کاملThe homology of the Higman–Thompson groups
We prove that Thompson’s group V is acyclic, answering a 1992 question of Brown in the positive. More generally, we identify the homology of the Higman–Thompson groups Vn,r with the homology of the zeroth component of the infinite loop space of the mod n− 1 Moore spectrum. As V = V2,1, we can deduce that this group is acyclic. Our proof involves establishing homological stability with respect t...
متن کاملThompson Digraphs: A Characterization
A nite-state machine is called a Thompson machine if it can be constructed from a regular expression using Thompson's construction. We call the underlying digraph of a Thompson machine a Thompson di-graph. We establish and prove a characterization of Thompson digraphs. As one application of the characterization, we give an algorithm that generates an equivalent regular expression from a Thompso...
متن کاملThompson: Postmodernism and Psychoanalysis
In the past decade or so the term postmodernism has captured the attention of a generation of artists, intellectuals, authors, and professionals to such a degree that the term has even crept into the comparatively sober psychoanalytic literature, the last place one would have expected to find it. Yet any marriage between the psychoanalytic treatment perspective with its painstaking, laborious p...
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ژورنال
عنوان ژورنال: American Journal of Sociology
سال: 1922
ISSN: 0002-9602,1537-5390
DOI: 10.1086/213464