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ENGL
2007
15 years 7 months ago
2007
— The aim of the present work is to present a characterization of the Gentzen System G by means of a regulated grammar, according to the Formal Languages Theory. Given a proposit...
167
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CORR
2004
Springer
15 years 6 months ago
2004
Springer
In this paper we introduce a fuzzy version of symport/antiport membrane systems. Our fuzzy membrane systems handle possibly inexact copies of reactives and their rules are endowed...
179
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NN
2000
Springer
15 years 6 months ago
2000
Springer
The visual cortex has a laminar organization whose circuits form functional columns in cortical maps. How this laminar architecture supports visual percepts is not well understood...
122
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COMBINATORICS
1999
15 years 6 months ago
1999
An asymptotic estimate is given for the coefficients of products of large powers of generating functions. This theorem and another local limit theorem which is useful for conditio...
142
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DM
1999
15 years 6 months ago
1999
In this paper, we illustrate a method to enumerate two-dimensional directed animals, with compact sources, on both the square and the triangular lattice. We give a recursive descr...