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The Math::Units module converts a numeric value in one unit of measurement to some other unit. The units must be compatible, i.e. length can not be converted to volume. If a conversion can not be made an exception is thrown. A combination chaining and reduction algorithm is used to perform the most direct unit conversion possible. Units may be written in several different styles. An abbreviation table is used to convert from common long-form unit names to the (more or less) standard abbreviations that the units module uses internally. All multiplicative unit conversions are cached so that future conversions can be performed very quickly. Too many units, prefixes and abbreviations are supported to list here. See the source code for a complete listing.

This class is a container class for numbers with a number of associated symmetric and asymmetric errors. It overloads practically all common arithmetic operations and trigonometric functions to propagate the errors. It can do proper scientific rounding (as explained in more detail below in the documentation of the significant_digit() method). You can use Math::BigFloat objects as the internal representation of numbers in order to support arbitrary precision calculations. Errors are propagated using Gaussian error propagation. With a notable exception, the test suite covers way over ninety percent of the code. The remaining holes are mostly difficult-to-test corner cases and sanity tests. The comparison routines are the exception for which there will be more extensive tests in a future release.

PLMan, or Propositional LogicMan, is a user-friendly and powerful propositional logic (sometimes called sentential logic or propositional calculus) sentence shell/interpreter written in Java, capable of handling many existing propositional systems of propositional logic, especially the important ones.

Statistics::Frequency is a simple class for counting elements, in other words, their frequencies. The goal of Statistics::Frequency is simply to be provide container for sets of elements and their respective frequencies.

The Statistics::Lite module is a lightweight, functional alternative to larger, more complete, object-oriented statistics packages. As such, it is likely to be better suited, in general, to smaller data sets.

This package attempts to make it easier to write scripts that use BigInts/BigFloats in a transparent way. They use the rewritten versions of Math::BigInt and Math::BigFloat, Math::BigRat (for bigrat) and optionally Math::BigInt::Lite.

This python module implements constants and functions for working with IEEE754 double-precision special values. It provides constants for Not-a-Number (NaN), Positive Infinity (Inf), and Negative Infinity (-Inf), as well as functions to test for these values.

NZMATH is a Python based number theory oriented calculation system. The centre of development in origin is Tokyo Metropolitan University. It is freely available and distributed under the BSD license.

A C-coded Python extension module that wraps the GMP library to provide to Python code fast multiprecision arithmetic (integer, rational, and float), random number generation, advanced number-theoretical functions, and more.

Physcalc is a neat mathematical calculator that does conversions from many different units in many forms, and is extremely flexible as far as specifying math problems go. You can also add your own types of conversions.