# Difference between revisions of "ApCoCoA-1:DA.DiffOrd"

From ApCoCoAWiki

S schuster (talk | contribs) m (ApCoCoA:Diffalg.DiffOrd moved to ApCoCoA:DA.DiffOrd: To comply with style principles.) |
m (insert version info) |
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+ | {{Version|1}} | ||

<command> | <command> | ||

<title>DA.DiffOrd</title> | <title>DA.DiffOrd</title> | ||

− | <short_description> | + | <short_description>Computes the differential order of a differential polynomial.</short_description> |

<syntax> | <syntax> | ||

DA.DiffOrd(F:POLY):INT | DA.DiffOrd(F:POLY):INT | ||

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Computes the differential order of the differential polynomial F. The differential order is the maximum order of the derivatives occuring in the terms of F. | Computes the differential order of the differential polynomial F. The differential order is the maximum order of the derivatives occuring in the terms of F. | ||

<itemize> | <itemize> | ||

− | <item>@param F A differential polynomial.</item> | + | <item>@param <em>F</em> A differential polynomial.</item> |

<item>@return Order of F.</item> | <item>@return Order of F.</item> | ||

</itemize> | </itemize> | ||

<example> | <example> | ||

− | Use | + | Use QQ[x[1..2,0..20]]; |

F:=x[1,4]^2-x[2,4]^3; | F:=x[1,4]^2-x[2,4]^3; | ||

DA.DiffOrd(F); | DA.DiffOrd(F); | ||

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<key>diffalg.DiffOrd</key> | <key>diffalg.DiffOrd</key> | ||

<key>differential.DiffOrd</key> | <key>differential.DiffOrd</key> | ||

− | <wiki-category>Package_diffalg</wiki-category> | + | <wiki-category>ApCoCoA-1:Package_diffalg</wiki-category> |

</command> | </command> |

## Latest revision as of 09:57, 7 October 2020

This article is about a function from ApCoCoA-1. |

## DA.DiffOrd

Computes the differential order of a differential polynomial.

### Syntax

DA.DiffOrd(F:POLY):INT

### Description

Computes the differential order of the differential polynomial F. The differential order is the maximum order of the derivatives occuring in the terms of F.

@param

*F*A differential polynomial.@return Order of F.

#### Example

Use QQ[x[1..2,0..20]]; F:=x[1,4]^2-x[2,4]^3; DA.DiffOrd(F); ------------------------------- 4 -------------------------------