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NLopt is a free/open-source library for nonlinear optimization, providing a common interface for a number of different free optimization outines available online as well as original implementations of various other algorithms. Its features include: - Callable from C, C++, Fortran, Matlab or GNU Octave, Python, GNU Guile, Julia, GNU R, Lua, and OCaml. - A common interface for many different algorithms -- try a different algorithm just by changing one parameter. - Support for large-scale optimization (some algorithms scalable to millions of parameters and thousands of constraints). - Both global and local optimization algorithms. - Algorithms using function values only (derivative-free) and also algorithms exploiting user-supplied gradients. - Algorithms for unconstrained optimization, bound-constrained optimization, and general nonlinear inequality/equality constraints.

This module is an extension to the Math::Symbolic module. A basic familiarity with that module is required. Math::Symbolic offers some builtin simplification routines. These, however, are not capable of complex simplifications. This extension offers facilities to override the default simplification routines through means of subclassing this module. A subclass of this module is required to define a simplify object method that implements a simplification of Math::Symbolic trees. There are two class methods to inherit: register and unregister. Calling the register method on your subclass registers your class as providing the simplify method that is invoked whenever simplify() is called on a Math::Symbolic::Operator object. Calling unregister on your subclass restores whichever simplification routines where in place before.

REDUCE is an interactive system for general algebraic computations of interest to mathematicians, scientists and engineers. It has been produced by a collaborative effort involving many contributors. Its capabilities include: * expansion and ordering of polynomials and rational functions; * substitutions and pattern matching in a wide variety of forms; * automatic and user controlled simplification of expressions; * calculations with symbolic matrices; * arbitrary precision integer and real arithmetic; * facilities for defining new functions and extending program syntax; * analytic differentiation and integration; * factorization of polynomials; * facilities for the solution of a variety of algebraic equations; * facilities for the output of expressions in a variety of formats; * facilities for generating optimized numerical programs from symbolic input; * calculations with a wide variety of special functions; * Dirac matrix calculations of interest to high energy physicists. It is often used as an algebraic calculator for problems that are possible to do by hand. However, REDUCE is designed to support calculations that are not feasible by hand.

Clasp is an answer set solver for (extended) normal logic programs. It combines the high-level modeling capacities of answer set programming (ASP) with state-of-the-art techniques from the area of Boolean constraint solving. The primary clasp algorithm relies on conflict-driven nogood learning, a technique that proved very successful for satisfiability checking (SAT). Unlike other learning ASP solvers, clasp does not rely on legacy software, such as a SAT solver or any other existing ASP solver. Rather, clasp has been genuinely developed for answer set solving based on conflict-driven nogood learning. clasp can be applied as an ASP solver (on SMODELS format, as output by Gringo), as a SAT solver (on a simplified version of DIMACS/CNF format), or as a PB solver (on OPB format).

You are in the presence of a System Administrator. Kneel. "On Usenet, we vent in a group called alt.sysadmin.recovery. The group has a FAQ. If you read the FAQ, you will find that you (the users) subscribe to this group at your own peril. If you want to be useful, why don't you run over to the supply cabinet and get a new box of pixels for the monitor. As part of our venting, some of us have written a series of man pages that we'd like to see." Manpages you ever needed: bosskill.8 c.1 chastise.3 ctluser.8 guru.8 knife.8 lart.1m luser.8 normality.5 nuke.8 people.2 pmsd.8 rtfm.1 slave.1 sysadmin.1 think.1 whack.1

Sort files or its standard input using the bogo-sort algorithm described in the Jargon File <http://www.catb.org/~esr/jargon/>. A quote from the Jargon File 'bogo-sort' entry: ...The archetypical perversely awful algorithm (as opposed to _bubble sort_, which is merely the generic bad algorithm). _Bogo-sort_ is equivalent to repeatedly throwing a deck of cards in the air, picking them up at random, and then testing whether they are in order. It serves as a sort of canonical example of awfulness. Looking at a program and seeing a dumb algorithm, one might say "Oh, I see, this program uses _bogo-sort_." Esp. appropriate for algorithms with factorial or super-exponential running time in the average case and probabilistically infinite worst-case running time. Compare _bogus_, _brute force_, _lasherism_...

Pexpect makes Python a better glue for controlling child applications. Pexpect is a pure Python module for spawning child applications; controlling them; and responding to expected patterns in their output. Pexpect works like Don Libes' Expect. Pexpect allows your script to spawn a child application and control it as if a human were typing commands. Pexpect can be used for automating interactive applications such as ssh, ftp, passwd, telnet, etc. It can be used to a automate setup scripts for duplicating software package installations on different servers. It can be used for automated software testing. Pexpect is in the spirit of Don Libes' Expect, but Pexpect is pure Python. The Pexpect interface was designed to be easy to use.

[ excerpt from developer's site ] - What is GStreamer? GStreamer allows the construction of graphs of media-handling components, ranging from simple mp3 playback to complex audio (mixing) and video (non-linear editing) processing. Applications can take advantage of advances in codec and filter technology transparently. Developers can add new codecs and filters by writing a simple plugin with a clean, generic interface. GStreamer is released under the LGPL, with many of the included plugins retaining the license of the code they were derived from, usually GPL or BSD. - Features: * Comprehensive Core Library * Intelligent Plugin Architecture * Extensive Development Tools - Is GStreamer a media player? No, GStreamer is a development framework for creating applications like media players, video editors, streaming media broadcasters and so on. That said, very good media players can easily be built on top of GStreamer and we even include a simple yet functional mediaplayer with GStreamer called Gst-Player

GStreamer allows the construction of graphs of media-handling components, ranging from simple mp3 playback to complex audio (mixing) and video (non-linear editing) processing. Applications can take advantage of advances in codec and filter technology transparently. Developers can add new codecs and filters by writing a simple plugin with a clean, generic interface. GStreamer is released under the LGPL, with many of the included plugins retaining the license of the code they were derived from, usually GPL or BSD. - Features: * Comprehensive Core Library * Intelligent Plugin Architecture * Extensive Development Tools - Is GStreamer a media player? No, GStreamer is a development framework for creating applications like media players, video editors, streaming media broadcasters and so on. That said, very good media players can easily be built on top of GStreamer and we even include a simple yet functional mediaplayer with GStreamer called Gst-Player

[ excerpt (with adaptations) from developer's README ] ffmpeg is a hyper fast realtime audio/video encoder, a streaming server and a generic audio and video file converter. It can convert a standard video source into several file formats based on DCT/motion compensation encoding. Sound is compressed in MPEG audio layer 2 or using an AC3 compatible stream. What makes ffmpeg interesting ? - Simple and efficient video encoder: outputs MPEG1, H263, Real Video(tm), MPEG4, DIVX and MJPEG compatible bitstreams using the same encoder core. - Hyper fast MPEG audio layer 2 compression (50 times faster than realtime on a K6 500). [snip -> rest on website below] ffmpeg is made of two programs: * ffmpeg: soft VCR which encodes in real time to several formats. It can also encode from any supported input file format to any input supported format. * ffserver: high performance live broadcast streaming server based on the ffmpeg core encoders.