منابع مشابه
Beyond the number domain.
In a world without numbers, we would be unable to build a skyscraper, hold a national election, plan a wedding or pay for a chicken at the market. The numerical symbols used in all these behaviors build on the approximate number system (ANS) which represents the number of discrete objects or events as a continuous mental magnitude. Here, we first discuss evidence that the ANS bears a set of beh...
متن کاملBeyond First Order Logic: From number of structures to structure of numbers: Part I
We study the history and recent developments in nonelementarymodel theory focusing on the framework of abstractelementary classes. We discuss the role of syntax and semanticsand the motivation to generalize first order model theory to nonelementaryframeworks and illuminate the study with concrete examplesof classes of models. This first part introduces the main conceps and philosophies anddiscu...
متن کاملBeyond first order logic: From number of structures to structure of numbers: Part II
We study the history and recent developments in nonelementarymodel theory focusing on the framework of abstractelementary classes. We discuss the role of syntax and semanticsand the motivation to generalize first order model theory to nonelementaryframeworks and illuminate the study with concrete examplesof classes of models. This second part continues to study the question of catecoricitytrans...
متن کاملB-Chromatic Number: Beyond NP-Hardness
The b-chromatic number of a graph G, χb(G), is the largest integer k such that G has a k-vertex coloring with the property that each color class has a vertex which is adjacent to at least one vertex in each of the other color classes. In the b-Chromatic Number problem, the objective is to decide whether χb(G) ≥ k. Testing whether χb(G) = ∆(G) + 1, where ∆(G) is the maximum degree of a graph, it...
متن کاملNational Cancer Control Programme: beyond number games.
Continuing the theme of number game from the previous editorial, it is time to initiate a wider discussion on the complex number game embedded the Indian National Cancer Control Programme (NCCP). NCCP is replete with numbers: number of cancer cases, number of cancer centres, number of registries, number of machines, number of tobacco users, leading numbers, receding numbers, missing numbers, du...
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ژورنال
عنوان ژورنال: Nature
سال: 1985
ISSN: 0028-0836,1476-4687
DOI: 10.1038/317117a0