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* There are two different math modules TeX was designed for ease of typesetting books that contained mathematics. As ConTeXt is built on [http://dante.ctan.org/tex-archive/macros/context/contrib/maths/ CTAN]top of TeX, [[Math with nath|nath]] and [[Math with amsl|amsl]]it inherits all those features.* It is also possible In addition to use most [[LaTeX Math in these, ConTeXt|LaTeX equations in ConTeXt]] with a relatively small set adds lot of macros to make the typesetting of supporting definitionsmathematics easier.* The "native" ConTeXt way There are '''two''' kinds of '''math is [[MathML]], an application of [[XML]] modes''' --- rather verbose but mighty'''inline math and display math'''.* And there's a [[Math Mathematical expressions that are written with newmat|new the running text are called inline math; while mathematical expressions that break the flow of the text (such as formulas or equations) are called display math]] module . TeX takes care of proper spacing around expressions and provides macros to typeset most mathematical constructs.Complicated expressions can be built by working in steps---break down the expression into sub-expressions, build the sub-expressions and then combine them to get the distributioncomplicated expression.

ConTeXt supports inline === Display math (mathematical formulas set within ordinary paragraphs as part of the text) and display math (mathematics set on lines by themselves, often with equation numbers). Inline math is enclosed in "$" signs, while display math is enclosed in a <cmd>startformula</cmd> / <cmd>stopformula</cmd> pair.mode ===Type

Inline math is set as $c^2 = a^2 + b^2$, and display math as\placeformula\startformulac^2 = a^2 + b^2... \stopformula

This, when typeset, produces the following: <context>Inline math is set as $c^2 = a^2 + b^2$, and to get display math as\placeformula\startformulac^2 = a^2 + b^2mode.\stopformula</context>

A more complicated equation:$ ... $ % TeX style.\placeformula\startformula{{\theta_{\text{ConTeXt}}}^2 \over x+2} = \pmatrix{a_{11}&a_{12}&\ldots&a_{1n}\cr a_{21}&a_{22}&\ldots&a_{2n}\cr \vdots&\vdots&\ddots&\vdots\cr a_m{n1}&a_{n2}&\ldots&a_{nn}\cr... } \pmatrixmath{b_1 \cr b_2 \cr \vdots \cr b_n} + \sum_{j=1... }^\infty z^j \left( \sum_mathematics{\scriptstyle n=1 \atop \scriptstyle n \ne j... }^\infty Z_j^n \right)\stopformula

which produces<context>A more complicated equation:\placeformula\startformula{{\theta_{\text{ConTeXt}}}^2 \over x+2} = \pmatrix{a_{11}&a_{12}&\ldots&a_{1n}\cr a_{21}&a_{22}&\ldots&a_{2n}\cr \vdots&\vdots&\ddots&\vdots\cr a_{n1}&a_{n2}&\ldots&a_{nn}\cr} \pmatrix{b_1 \cr b_2 \cr \vdots \cr b_n} + \sum_{j=1}^\infty z^j \left( \sum_{\scriptstyle n=1 \atop \scriptstyle n \ne j}^\infty Z_j^n \right)Note to Plain TeX Users ===\stopformula</context> [http://wwwConTeXt is plain TeX compatible.ntgSo, if you have any old document written in plain TeX, it will work with ConTeXt.nl:8061/texmathThis does not mean that you will get pixel by pixel identical output with ConTeXt.pdf Here] For inline math, everything that you can try it "live" (PDF interface!)learnt for plain TeX is also true for ConTeXt. [[MathAlignment]] However, display math is covered on a separate pagesignificantly different. ==Formula Numbering== As mentioned above, formulas can be numbered using the '''Do not use <cmdcode>placeformula</cmd> command$$ .... This (and the related <cmd>placesubformula$$</cmdcode> command have an optional argument which can be used ''' to produce sub-formula numberingwrite display math formulas in ConTeXt, since you will not get the correct spacing around the formulas. For example:Instead use

Examples:\placeformula{a}\startformulac^2 = a^2 + b^2\stopformula \placesubformula{b}\startformulac^2 = a^2 + b^2... \stopformula

<context>Examples:\placeformula{a}\startformulac^2 = a^2 + b^2\stopformula \placesubformula{b}\startformulac^2 = a^2 + b^2\stopformula<See [[Math/context> What's going Display]] for more details on here is simpler than it might appear at first glance. Both <cmd>placeformula</cmd> and <cmd>placesubformula</cmd> produce equation numbers with the optional tag added at the end; the sole difference is that the former increments the equation number first, while the latter does not (and thus can be used for the second and subsequent formulas that how to use the same formula number but presumably have different tags)display math in ConTeXt.

This is sufficient for cases where === Note to AMSTeX/LaTeX Users ===ConTeXt offers almost all the standard ConTeXt equation numbers suffice, features that are present in AMSTeX and where only one equation number is needed per formulaLaTeX. However, there are many cases where ConTeXt syntax is different. See this is insufficient, and <cmd>placeformula<[http:/cmd> defines <cmd>formulanumber</cmd> and <cmd>subformulanumber<dl.contextgarden.net/myway/cmd> commands, which provide hooks context-latex-math.pdf My Way] for how to 'translate' from amsmath syntax to allow the use of ConTeXt-managed formula numbers with plain TeX equation numberingsyntax. These, when used within a formula, simply return [[LaTeX_Math_in_ConTeXt]] gives some brief ideas on how to get the formula number LaTeX syntax to run in properly formatted form, as can be seen in this simple example with plain TeX's <cmd>eqno</cmd>. Note that the optional tag is inherited from <cmd>placeformula</cmd>ConTeXt.

<texcode>More examples:\placeformula{c}\startformula\let\doplaceformulanumber\emptyc^2 = a^2 + b^2 \eqno{\formulanumber}\stopformula</texcode>= The details ==

<context>=== Math symbols ===* [[Math/basic | How to input math]] (binary relations, greek letters, subscripts and superscripts)* Accents* [[Math/stackers | underbrace]], [[Math/stackers | overbrace]]More examples:* [[Math/fractions | Fractions, Binomials, genfrac, continued fractions.]]\placeformula{c}* Delimiters (big, bigg, left, middle, right)\startformula* Integrals and Sums\let\doplaceformulanumber\empty* ([[Math/functions|Log like]]) functionsc^2 = a^2 + b^2 \eqno{\formulanumber}* dots\stopformula* [[Multiline_equations#Cases|Cases]], matrices, bordermatrix<* Arrows (see [http:/context>/dl.contextgarden.net/myway/matharrows.pdf Math Arrows])* [[Vectors]]* [[Product integral]]

In order for this to work properly=== Display Math ===* [[Math/Display | Formula, we need to turn off ConTeXt's automatic formula number placement; thus the <cmd>let<]]* [[Multiline equations]] (see [http:/cmd> command to empty <cmd>doplaceformulanumber</cmd>, which must be placed <em>after</em> the start of the formuladl.contextgarden. In many practical examples, however, this is not necessary; ConTeXt redefines <cmd>displaylines<net/cmd> and <cmd>eqalignno<myway/cmd> to do this automaticallymathalign.pdf Using \mathalign and friends])* [[Equation alignment]]* [[Math spacing]]* Discussion: [[User_talk:Zenlima | summary of formula numbering problems]] (comment: unverified)

<texcode>Yet more examplesOthers:\placeformula\startformula* [[math calligraphic]]\eqalignno{c^2 &= a^2 + b^2 * Use [[mathstackers]] &\formulanumber{a} \crin order to define new math commands in which some characters are stacked over another one a^2 + b^2 &= c^2 &* [[\subformulanumber{b} \cr d^2 &= e^2 &\formulanumber\cr}\stopformula</texcode>startcases]]

<context>Yet more examples:\placeformula\startformula\eqalignno{c^2 &= a^2 + b^2 &\formulanumber{a} \cr a^2 + b^2 &= c^2 &\subformulanumber{b} \cr d^2 &Math Fonts== e^2 &\formulanumber\cr}\stopformula</context>

Note that both <cmd>formulanumber</cmd> and <cmd>subformulanumber</cmd> can be used within ''See [[Math fonts]]'' for the same formula, and the formula number is incremented as expected. Also, if an optional argument is specified in both <cmd>placefigure</cmd> and <cmd>formulanumber</cmd>, the latter takes precedencemain article about this subject.

==Number FormattingOther Methods ==* There's a special command, <cmd>digits</cmd>, and a own manual about formatting numbers, see are two different math modules on [http://wwwdante.pragmactan.org/tex-ade.comarchive/macros/context/generalcontrib/magazinesmaths/mag-0003CTAN], [[Math with nath|nath]] and [[Math with amsl|amsl]].pdf Pasting digits togetherAnd there's a [[Math with newmat|new math]] module in the distribution. ==Math * Context now has inbuilt support for [[FontsMultiline equations]]==* It is also possible to use most [[Bold LaTeX Mathin ConTeXt|LaTeX equations in ConTeXt]]with a relatively small set of supporting definitions.* [http://homepage.mac.com/atl/tex/EulerContext.pdf Euler in The "native" ConTeXt (using Euler way of math font)is [[MathML] by Adam Lindsay], an application of [[XML]] - rather verbose but mighty.

* Esp. for physics there’s the [[unitsUnits]] module.

* There's a module for chemical structure formulae: [[Chemistry|PPCHTeX]] (works also with LaTeX). It ==Number Formatting==There's based on a special command, <cmd>digits</cmd>, with its own manual about formatting numbers, see [[Metaposthttp://www.pragma-ade.com/general/magazines/mag-0003.pdf Pasting digits together]] and  ==Evaluating expressions in ConTeXt==(i.e. ''doing'' math)* See also [[MetaFunExpressions]].