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Element theorem


Mixed Content Model



NameTypeDefault Value
layout CDATA None
style CDATA None
countlike CDATA None
class CDATA None
xml:lang NMTOKEN None
id ID None

Parameter Entities

The following parameter entities contain theorem: bigblock, mathblock, sectbegin


Inserts a (mathematical) theorem, corollar, lemma, definition, or a remark, a note, an exercise, or an example. It is allowed everywhere where you could insert a floating figure.

For this element, the class attribute is vital. It is interpreted as the kind of the theorem. E.g., you could say

<theorem class="Remark">A short mathematical remark.</theorem>

If class is ommitted a default is used.

The countlike contains another <theorem> class with which the current one should share numbering. Otherwise, every <theorem> class gets its own counting. For example,

<theorem class="Corollary"
  countlike="Lemma"><subject>Streetmentioner's Corollary</subject>A
  short mathematical corollary.  If it's corollary
  number 4, the next lemma will have number 5.</theorem>

If you want to supress counting, set countlike to "(none)". If you don't want to have the chapter number included into the theorem number, set countlike to "(global)".

The name of the theorem is the same as its class. If you want another name, include a <heading> element.

Within <subject></subject>, you can include e.g. a special name for the theorem. This is printed within brackets after the word “Theorem” (or whatever).

With the layout attribute, you can choose another style. Prefefined are the AmSTeX styles plain, definition, and remark. If you want to add another one, you have to give its definition in a LaTeX package.

Important: Only the very first occurence of a certain <theorem> class is allowed to have <heading>, countlike or layout.


article, chapter, paragraph, section, subparagraph, subsection, subsubsection


ch, cite, description, dm, em, enumerate, footnote, graphics, heading, hspace, idx, indexsee, itemize, ix, latex, m, math, mathref, multipar, p, pageref, quote, ref, relax, subject, tabular, unit, url, verb, verbatim, verse, visual, vref, wrap

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