منابع مشابه
A general theory of self-similarity I
Consider a self-similar space X . A typical situation is that X looks like several copies of itself glued to several copies of another space Y , and Y looks like several copies of itself glued to several copies of X , or the same kind of thing with more than two spaces. Thus, the self-similarity of X is described by a system of simultaneous equations. Here I formalize this idea and the notion o...
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The different kinds of self-similarity in general relativity are discussed, with special emphasis on similarity of the " first " kind, corresponding to spacetimes admitting a ho-mothetic vector. We then survey the various classes of self-similar solutions to Einstein's field equations and the different mathematical approaches used in studying them. We focus mainly on spatially homogenous and sp...
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We demonstrate how the identity N N = N in a monoidal category allows us to construct a functor from the full subcategory generated by N and to the endomorphism monoid of the object N. This provides a categorical foundation for one-object analogues of the symmetric monoidal categories used by J.-Y. Girard in his Geometry of Interaction series of papers, and explicitly described in terms of inve...
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according to research, academic self-concept and academic achievement are mutually interdependent. in the present study, the aim was to determine the relationship between the academic self-concept and the academic achievement of students in english as a foreign language and general subjects. the participants were 320 students studying in 4th grade of high school in three cities of noor, nowshah...
Measuring the Similarity of Trajectories Using Fuzzy Theory
In recent years, with the advancement of positioning systems, access to a large amount of movement data is provided. Among the methods of discovering knowledge from this type of data is to measure the similarity of trajectories resulting from the movement of objects. Similarity measurement has also been used in other data mining methods such as classification and clustering and is currently, an...
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ژورنال
عنوان ژورنال: Advances in Mathematics
سال: 2011
ISSN: 0001-8708
DOI: 10.1016/j.aim.2010.10.009