منابع مشابه
Levelling an unknotting tunnel
It is a consequence of theorems of Gordon–Reid [4] and Thompson [8] that a tunnel number one knot, if put in thin position, will also be in bridge position. We show that in such a thin presentation, the tunnel can be made level so that it lies in a level sphere. This settles a question raised by Morimoto [6], who showed that the (now known) classification of unknotting tunnels for 2–bridge knot...
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W ith an ever-declining number of papers written in languages other than English, the idiom of Shakespeare is, today more than ever before, the international language of science [1,2]. In 2014, according to PubMed’s language filter, 95.4% of life science publications retrieved by the search engine were written in English, in line with the trend of the last several decades [1,2]. Today, among th...
متن کاملGeneralized Erlang and mortality levelling off distributions
In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: Keywords: Bathtub shape Burr distribution Deceleration Decreasing Erlang Hazard rate function Increasing Gompertz Levelling-...
متن کاملPattern Recognition of Strings Containing Traditional and Generalized Transposition Errors1
We study the problem of recognizing a string Y which is the noisy version of some unknown string X* chosen from a finite dictionary, H. The traditional case which has been extensively studied in the literature is the one in which Y contains substitution, insertion and deletion (SID) errors. Although some work has been done to extend the traditional set of edit operations to include the straight...
متن کاملLevelling in antiquity: instrumentation, techniques and accuracies
Certain major ancient engineering constructions, such as aqueducts and qanats, testify to high accuracies in the computation of elevation differences obtained using primitive levelling instruments. Based on the typology of ancient levelling instruments and the analysis of certain key ancient structures such as the (Eupalinos) tunnel at Samos Island (Greece), it became possible to specify the ac...
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ژورنال
عنوان ژورنال: Nature
سال: 1920
ISSN: 0028-0836,1476-4687
DOI: 10.1038/105409a0