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2. List of open-source software for mathematics - Wikipedia

   en.wikipedia.org/wiki/List_of_open-source...

   This free software had an earlier incarnation, Macsyma. Developed by Massachusetts Institute of Technology in the 1960s, it was maintained by William Schelter from 1982 to 2001. In 1998, Schelter obtained permission to release Maxima as open-source software under the GNU General Public license and the source code was released later that year ...

3. Contribution margin - Wikipedia

   en.wikipedia.org/wiki/Contribution_margin

   Contribution margin analysis is a measure of operating leverage; it measures how growth in sales translates to growth in profits. The contribution margin is computed by using a contribution income statement, a management accounting version of the income statement that has been reformatted to group together a business's fixed and variable costs.

4. Calculix - Wikipedia

   en.wikipedia.org/wiki/Calculix

   CalculiX is a free and open-source finite-element analysis application that uses an input format similar to Abaqus. It has an implicit and explicit solver (CCX) written by Guido Dhondt and a pre- and post-processor (CGX) written by Klaus Wittig. [1] The original software was written for the Linux [2] operating system.

5. Group-contribution method - Wikipedia

   en.wikipedia.org/wiki/Group-contribution_method

   The simplest form of a group-contribution method is the determination of a component property by summing up the group contributions : [] = +.This simple form assumes that the property (normal boiling point in the example) is strictly linearly dependent on the number of groups, and additionally no interaction between groups and molecules are assumed.

6. Mathematical software - Wikipedia

   en.wikipedia.org/wiki/Mathematical_software

   The Netlib repository contains various collections of software routines for numerical problems, mostly in Fortran and C.Commercial products implementing many different numerical algorithms include the IMSL, NMath and NAG libraries; a free alternative is the GNU Scientific Library.

7. List of statistical software - Wikipedia

   en.wikipedia.org/wiki/List_of_statistical_software

   Ploticus – software for generating a variety of graphs from raw data; PSPP – A free software alternative to IBM SPSS Statistics; R – free implementation of the S (programming language) Programming with Big Data in R (pbdR) – a series of R packages enhanced by SPMD parallelism for big data analysis; R Commander – GUI interface for R

8. Contribution margin-based pricing - Wikipedia

   en.wikipedia.org/wiki/Contribution_margin-based...

   Contribution margin-based pricing is a pricing strategy which works without any mention of gross margin percentages or sales (Gross Merchandise Volume). (German:Deckungsbeitrag) It maximizes the profit derived from a company's assortment, based on the difference between a product's price and variable costs (the product's contribution margin per unit), and on one's assumptions regarding the ...

9. Free software - Wikipedia

   en.wikipedia.org/wiki/Free_software

   Free software advocates strongly believe that this methodology is biased by counting more vulnerabilities for the free software systems, since their source code is accessible and their community is more forthcoming about what problems exist as a part of full disclosure, [39] [40] and proprietary software systems can have undisclosed societal ...