History: neat and messy
نویسندگان
چکیده
منابع مشابه
Messy Solutions For Messy Problems
We spend|and waste|too much time discussing the pros and cons of diierent programming paradigms and too little time discussing the problems we want to solve. The rst section of this note introduces a problem; the remaining sections discuss approaches to solving it. 1 A problem The problem is to design a computer program that plays good snooker. (You can substitute \pool" or \billiards" for snoo...
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In Government of paper, Matthew Hull has given us one of the most finely grained, ethnographically rich analyses of the role of material artifacts in the working of states. His focus on files, maps, the parchi and the petition, and lists and land records, is a sorely needed addition to the ethnographic record. As a linguistic anthropologist, he is uniquely positioned to reflect on the linguisti...
متن کاملNeat Embeddings and Amalgamation
We present a property of neat reducts commuting with forming subalgebras as a definability condition. The purpose of this paper is to relate results on neat reducts, a notion particular to cylindric algebras to results on the “more universal” strong amalgamation property in a very general setting. It is known [7], [8] and [6] that amalgamation properties in a class of algebras correspond to int...
متن کاملNeat Rings
A ring is called clean if every element is the sum of a unit and an idempotent. Throughout the last 30 years several characterizations of commutative clean rings have been given. We have compiled a thorough list, including some new equivalences, in hopes that in the future there will be a better understanding of this interesting class of rings. One of the fundamental properties of clean rings i...
متن کاملHeredity in Messy Chemistries
For natural selection to progress, there must be a sufficiently large evolutionary space to explore. In systems with template-based replication, this space is combinatorially large in the length of the information-carrying molecules. Previous work has shown that it is also possible for heredity to occur in much less structured chemistries; this opens the question of how the structure of a react...
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ژورنال
عنوان ژورنال: Educational Considerations
سال: 1980
ISSN: 0146-9282
DOI: 10.4148/0146-9282.1920