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Displaying similar documents to “ConTeXt - Lua Documents”

The current state of the PSTricks project

Herbert Voss (2010)

Zpravodaj Československého sdružení uživatelů TeXu

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PSTricks is an abbreviation for PostScript Tricks and uses the enormous graphical capabilities of the old programming language PostScript. It is a so-called page code language (PCL) which is distributed since 1984 by Adobe Systems. PostScript is fully Turing compatible and a stack-oriented programming language, like Assembler, Forth, Hewlett Packard pocket calculators, et al. PDF is derived from PostScript, with some important extensions but without the possibility of mathematical calculations. ...

Programujeme L-systémy v PostScriptu

Michel Charpentier (2012)

Zpravodaj Československého sdružení uživatelů TeXu

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Although we tend to think of PostScript as a file format used to describe graphics, it is in reality a full-fledged programming language with graphical capabilities. Thus, the power of PostScript goes far beyond that of simple vector-graphics formats. All sorts of computations can be programmed, including complex arithmetic calculations. In this paper, we show how to use recursive functions in PostScript to implement a family of rewriting structures known as L-systems. Based on these...

A Coalgebraic Semantics of Subtyping

Erik Poll (2010)

RAIRO - Theoretical Informatics and Applications

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Coalgebras have been proposed as formal basis for the semantics of objects in the sense of object-oriented programming. This paper shows that this semantics provides a smooth interpretation for subtyping, a central notion in object-oriented programming. We show that different characterisations of behavioural subtyping found in the literature can conveniently be expressed in coalgebraic terms. We also investigate the subtle difference between behavioural subtyping and refinement. ...

A Language for Compositional Programming: A Rationale and Design Език за композиционно програмиране: Обосновка и конструкция

Bantchev, Boyko (2011)

Union of Bulgarian Mathematicians

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Бойко Бл. Банчев - Представена е обосновка и описание на език за програмиране в композиционен стил за опитни и учебни цели. Под “композиционен” имаме предвид функционален стил на програмиране, при който пресмятането е йерархия от композиции и прилагания на функции. Един от данновите типове на езика е този на геометричните фигури, които могат да бъдат получавани чрез прости правила за съотнасяне и така също образуват йерархични композиции. Езикът е силно повлиян от GeomLab, но по редица...

Airspace sectorization with constraints

Huy Trandac, Philippe Baptiste, Vu Duong (2010)

RAIRO - Operations Research

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We consider the Airspace Sectorization Problem (ASP) in which airspace has to be partitioned into a given number of sectors, each of which being assigned to a team of air traffic controllers. The objective is to minimize the coordination workload between adjacent sectors while balancing the total workload of controllers. Many specific constraints, including both geometrical and aircraft related constraints are taken into account. The problem is solved in a constraint programming framework....