InformalEquation ::= (Alt?, (Graphic+|MediaObject+))
Both the start- and end-tags are required for this element.
An InformalEquation is usually a mathematical equation or a group of related mathematical equations.
These elements contain InformalEquation: Answer, Appendix, Article, BiblioDiv, Bibliography, BlockQuote, Callout, Caution, Chapter, Equation, Example, Figure, Footnote, Glossary, GlossDef, GlossDiv, Important, Index, IndexDiv, InformalExample, InformalFigure, ListItem, MsgExplan, MsgText, Note, Para, PartIntro, Preface, Procedure, QandADiv, QandASet, Question, RefSect1, RefSect2, RefSect3, RefSynopsisDiv, Sect1, Sect2, Sect3, Sect4, Sect5, Section, SetIndex, Sidebar, SimpleSect, Step, Tip, Warning.
The following elements occur in InformalEquation: Alt, Graphic, MediaObject.
In some contexts, the following elements are allowed anywhere: BeginPage, IndexTerm.
Equation, Example, Figure, InformalExample, InformalFigure, InformalTable, InlineEquation, Subscript, Superscript, Table
<!DOCTYPE para PUBLIC "-//OASIS//DTD DocBook V3.1//EN"> <para> The equation <informalequation> <alt>e^(pi*i) + 1 = 0</alt> <graphic fileref="figures/epi10"></graphic> </informalequation> is delightful because it joins together five of the most important mathematical constants. </para>
The equation
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