Graph of a function: Difference between revisions

Revision as of 20:38, 17 April 2005

Revision as of 08:13, 27 April 2005

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The concept of the graph of a function is generalised to the graph of a [[relation (mathematics)|relation]]. Note that although a function is always identified with its graph, they are not the same because it will happen that two functions with different [[codomain]] could have the same graph. For example, the cubic polynomial mentioned above is a [[surjection]] if its codomain is the [[real number]]s but it is not if its codomain is the [[complex number|complex field]].

== Tools for plotting function graphs ==

Dedicated [[hardware]]:

* [[graphing calculator]]

*[[oscilloscope]]

Multi-purpose [[software]] that can be used for function plotting:

*[[spreadsheet]]s like [[Openoffice.org|Openoffice oocalc]], [[Microsoft Excel]]

*[[computer algebra system]]s like [[Maple]], [[Maxima]], [[Yacas]], [[Mathematica]]

Dedicated function plotting software:

*[http://descartes.sourceforge.net/ descartes], open-source, primarily for use in schools

==See also==

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* [[derivative]]

* [[epigraph]]

* [[graphing calculator]]

* [[stationary point]]

* [[slope]]