| Directory > Computers > Programming > Languages > Constraint Constraints: An International Journal
Covering all aspects of computing with constraints; on paper or online, via Kluwer Online; fee
required.
http://ipsapp007.kluweronline.com/ips/frames/error.asp?J=&ET=&UMSG=An+error+occurred+wh....
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Seventh International Conference on Principles and Practice of Constraint Programming
2001 November 26 - December 1, Paphos, Cyprus.
http://www2.cs.ucy.ac.cy/~iclpcp01/CP01home.html
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Garnet: Brad A. Myers
Personal page of Garnet inventor and lead researcher. Describes Garnet motives, rationale.
http://www-2.cs.cmu.edu/~bam/
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Garnet Toolkit FAQ
Frequently Asked Questions about Garnet user interface development environment for Common Lisp and
X11 or Macintosh developed by User Interface Software Group, Human-Computer Interaction Institute,
Carnegie Mellon University.
http://www.faqs.org/faqs/garnet-faq/
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ThingLab
Simulation laboratory: environment to build dynamic models of experiments in geometry, physics:
simulations of constrained geometric objects, simple electrical circuits, mechanical linkages,
bridges under load. Can use methods developed for these domains to model other sorts of objects:
graphical calculator, documents with constraints on layout and contents.
http://www.cosc.canterbury.ac.nz/~wolfgang/NewHome/cosc414/projects/thinglabFolder/html/thingla....
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Computer Support in the Design of Mechanical Products
Constraint specification and satisfaction in feature based design for manufacturing. Ph.D. thesis.
http://www.coe.uncc.edu/%7Ergwilhel/courses/MEGR6090.fall98/readings/Salomons-Thesis/
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Cassowary
Incremental constraint solving toolkit, efficiently solves systems of linear equalities,
inequalities. Constraints can be requirements or preferences. Client code specifies constraints to
maintain, and the solver updates constrained variables to have values that satisfy the constraints.
http://www.cs.washington.edu/research/constraints/cassowary/
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University of London, Royal Holloway: Constraints Group
In the Department of Computer Science: descriptions, research, members, publications, links.
http://www.dcs.rhbnc.ac.uk/research/constraints/
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A Differential Approach to Graphical Interaction
The ad hoc manner in which direct manipulation interfaces have been designed and implemented
restricts the types of interactive controls. This dissertation presents a new approach for a
systematic method to implement flexible, combinable interactive controls.
http://www.cs.wisc.edu/graphics/Papers/Gleicher/Thesis/
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Constraints for the Web
Constraints can specify desired layout of web documents, and behavior of embedded applets: 2 system
architectures where author and viewer can make layout constraints, needed and optional. Final
appearance of page comes from negotiation between author and viewer, via solving all the
constraints.
http://www.cs.washington.edu/research/constraints/web/mm97.dir/
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Sketchpad: Ivan E. Sutherland
Very brief, trivial explanation of the first constraint language, and its author.
http://www.sun.com/960710/feature3/sketchpad.html
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Omega Project
Frameworks and algorithms for analyzing and transforming scientific programs; 2 major components:
the Omega test system to manipulate sets of affine constraints over integer variables; and
developing frameworks to analyze and transform programs.
http://www.cs.umd.edu:80/projects/omega/
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Constraint Handling Rules: CHR
High-level programming language to write constraint systems; makes it easy to define constraint
reasoning: simplification and propagation, and incremental solving (satisfaction) of constraints.
Run and test CHR online; do a demo, try it now.
http://www.informatik.uni-ulm.de/pm/mitarbeiter/fruehwirth/chr-intro.html
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Principles and Practice of Constraint Programming
Book by Vijay Saraswat and Pascal Van Hentenryck. Description of book, MIT Press: collection of 23
original papers is first effort to assemble the work of constraint programming researchers
scattered across the world in multiple disciplines.
http://www-mitpress.mit.edu/catalog/item/default.asp?ttype=2&tid=8270
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ThingLabII: Constraint-based user interfaces
Supports exploration of constraint-based user interfaces; consists of a set of classes that define
constraints and constrainable objects called things. Incremental constraint satisfier, module
compiler, construction-set style user interface, many tools, extensible set of primitive user
interface building blocks.
http://www-2.cs.cmu.edu/afs/cs/project/ai-repository/ai/areas/constrnt/systems/thinglab/0.html
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MAC
FTP download, no separate documentation.
http://www.lirmm.fr/ftp/CSP/
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DeltaBlue: Benchmarking Java with Richards and DeltaBlue
Constraint solver benchmark, in Java; about 1000 lines of code. DeltaBlue first implemented by John
Maloney at University of Washington, translated to many languages: C, C++, Java; Smalltalk. [Sun
Microsystems Labs]
http://research.sun.com/people/mario/java_benchmarking/
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MAC and Combined Heuristics: Two Reasons to Forsake FC (and CBJ?) on Hard Problems
ResearchIndex: In the last 20 years, many algorithms and heuristics were developed to find
solutions in constraint networks. Their number increased so much that it quickly became vital to
compare performance to propose a small number of good methods.
http://citeseer.nj.nec.com/bessiere96mac.html
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StarFLIP++
Free, reusable iterative optimization library for combinatorial problems with fuzzy constraints.
GNU LGPL.
http://www.dbai.tuwien.ac.at/proj/StarFLIP/
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ICOT Free Software
Free constraint software developed by Institute for New Generation Computer Technology (ICOT),
Japan: Constraint MGTP (CMGTP) model generation theorem prover (MGTP), MGTP-G, KLIC, some
cu-Prologs, and documents. FTP site.
ftp://ftp.icot.or.jp/ifs/
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Pascal Van Hentenryck
Brown University, US. Some constraint papers.
http://www.cs.brown.edu/people/pvh/
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Constraint-based Languages and Environments for Building Interactive Systems
Page about Alan Borning, a leading researcher in the field. From NSF conference ISGW '97:
Interactive Systems Grantees Workshop.
http://cslu.cse.ogi.edu/nsf/isgw97/reports/borning.html
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GUIdeLA: Constraint Language and System for Constructing Graphical User Interfaces
Building a user-friendly Graphical User Interface (GUI) with languages like C++ or Java is
difficult and time-consuming, because such languages demand specifying many details about the
geometric data of layout, the sequence in which items are displayed, the sequence in which events
are handled.
http://www.icot.or.jp/ARCHIVE/Museum/FUNDING/97/plan22.html
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Techno-Pulsar
Potent new optimization technology for multidimensional optimization practical problems with
continuous, breaking nondifferentiative and stochastic goal functions, 100 or more variables, cuts
the cost and time to creation of new technical systems.
http://www.orc.ru/~pulsar/
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Garnet: Multi-Garnet: Integrating Multi-Way Constraints with Garnet
ResearchIndex: Constraints provide a useful mechanism to maintain relations in user interface
toolkits. Garnet is a widely used user interface toolkit with high functionality, based on one way,
required constraints. Multi-Garnet extends this by adding support for multi-way constraints and
hierarchies.
http://citeseer.nj.nec.com/62541.html
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Natural Programming
Attempt to make a system that is easier to learn and use than anything available to novice
programmers today: HANDS: Human-centered Advances for Novice Development of Software. School of
Computer Science, Carnegie Mellon University; NSF funded.
http://www-2.cs.cmu.edu/~NatProg/
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Advanced Constraint Techniques for User Interface Implementation
Project to develop and explore using advanced constraint methods to make user interface software.
Constraints as a general computational technique allow declaring a set of relationships between
entities. A constraint satisfaction system is employed to automatically ensure that the
relationships hold under changing conditions.
http://cslu.cse.ogi.edu/nsf/isgw97/reports/hudson.html
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Garnet Project
Generating an Amalgam of Real-time, Novel Editors and Toolkits; developed by User Interface
Software Group, Human Computer Interaction Institute, School of Computer Science, Carnegie Mellon
University. Free: public domain.
http://www-2.cs.cmu.edu/~garnet/
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Automated Construction of Virtual Worlds Using Modeling Constraints
Designing and specifying 3D scenes is a tedious, time consuming process that often degenerates into
trial and error. We propose a new way to form virtual worlds based on geometric modeling
constraints and higher-level modeling abstractions.
http://www.student.seas.gwu.edu/~rohrer/auto-modeling-report
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Graph Theory and Constraint Programming
University course: definitions, lecture notes, books, language descriptions, links.
http://www.cs.adfa.edu.au/~gtc/GTC/
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ILOG Solver
ILOG's constraint-programming optimization engine, providing cutting-edge optimization technology
and an optimization library for workforce scheduling, league scheduling, sequencing, configuration,
dispatching and resource-allocation applications with logical constraints.
http://www.ilog.com/products/solver/
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Koalog Constraint Solver
A constraint solver written in the JavaTMprogramming language.
http://www.koalog.com/php/jcs.php
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Brandeis Interval Arithmetic Constraint Solver
Java applet that solves non-linear real arithmetic constraints.
http://www.cs.brandeis.edu/~tim/Applets/IAsolver.html
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Constraints Archive
Holds comp.constraints FAQ, pages of constraint-related pointers, source code for various systems,
benchmarks, directory of people interested in constraints, constraint bibliographies, collection of
online papers, extensive links. Clearly the product of much work.
http://www.cs.unh.edu/ccc/archive/
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Book: Foundations of Constraint Satisfaction
Description of book, Academic Press, release 1993: programs from book.
http://cswww.essex.ac.uk/CSP/edward/FCS.html
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Book: Programming with Constraints: an Introduction
Description of book, MIT Press, release March 1998: programs from book, slides for courses for use
with book.
http://www.cs.mu.oz.au/~pjs/book/book.html
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University of Washington: Constraint-Based Systems
Constraints research group, Department of Computer Science and Engineering. Home of DeltaBlue,
Cassowary. Neat constraint Java Applet demonstrates a theorem about quadrilaterals.
http://www.cs.washington.edu/research/constraints/
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DeltaBlue code archive
For incremental dataflow constraint solver, implemented in varied languages, each in a subdirectory
named after the language: C DEC, C SUN4; Common Lisp, Smalltalk.
ftp://ftp.cs.washington.edu/pub/constraints/code/DeltaBlue/
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DeltaBlue Constraint Solver
Efficient, incremental local propagation constraint solver. Like most local propagation algorithms,
it cannot accommodate cyclic constraints. University of Washington site.
http://www.cs.washington.edu/research/constraints/deltablue/
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FSQP: Feasible Sequential Quadratic Programming
By AEM Design: a source code for minimizing the maximum of a set of smooth objective functions
subject to general smooth constraints. Two versions, written in portable: Fortran 77 (FFSQP),
standard C (CFSQP). Both are tested and run on most platforms.
http://www.aemtechnology.com/aemdesign/FSQPframe.htm
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Explanation-based constraint programming
Definitions, applications, libraries, links.
http://www.e-constraints.net/
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University of Essex: Constraint Programming Group
Several very interesting projects: GENET; Guided Local Search, GLS; Guided Genetic Algorithm, GLS;
Adaptive Constraint Satisfaction, ACS; Computer-Aided Constraint-Programming, CACP.
http://cswww.essex.ac.uk/CSP/
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Guide to Constraint Programming
Online tutorial/textbook for beginners to the area of constraint programming. This area is of the
set of less known software technologies, but is evolving rapidly and has a growing, significant
commercial interest.
http://ktiml.mff.cuni.cz/~bartak/constraints/
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ResearchIndex: Kaleidoscope: A Constraint Imperative Programming Language
The Constraint Imperative Programming CIP family of languages integrates constraints and
imperative, object oriented programming. Besides merging useful features of both paradigms, such
integration has synergistic effects.
http://citeseer.nj.nec.com/lopez93kaleidoscope.html
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