Template:Eqn

Usage

Used to add new rows of aligned math text.

{{begin-eqn}} needs to be called first.

You can add a new general row in the following manner:

{{eqn |l= 
      |r=
}}

The different possible variables that can be used are:

1. n - Right at the very far left (when needed), to be used for numbering, i.e. for labels.
2. ll - Furthest left column.
3. lo - Next furthest left column (usually for operators on multi-line equations).
4. l - General left column.
5. o - Operator, defaults to $=$
6. r - General right column.
7. ro - Next furthest right column (usually for operators on multi-line equations).
8. rr - Furthest right column.
9. c - Comment
10. cc - Extra comment (used only when needed).

Math delimiters (i.e. $ ... $, or \( ... \) etc.) must be used only on the c and cc lines.

Once the full equation is completed, {{end-eqn}} must be called.

Warning

Do not put two closing curly brackets together, e.g. }} because the interpreter thinks this marks the end of the template and it breaks the syntax.

Put a space between them: } }

Also beware: the vertical bar character $|$ can not be included anywhere in $\LaTeX$ used to define equations using this template.

• Use \vert instead of |: it produces $\vert$.
• Use \Vert instead of || or \|: it produces $\Vert$.

These commands may also be used in conjunction with \left and \right commands for automatic sizing.

Other constructs may also misbehave. Please beware.

Example

{{begin-eqn}}
{{eqn-title|Test equation}}
{{eqn | l=42 
      | r=21 \cdot 2
}}
{{eqn | o=\le|r=12345
      | c=since $21 \cdot 2 = 42 \le 12345$
}}
{{end-eqn}}

gives:

Test equation

	\(\displaystyle \)	\(\displaystyle \)	\(\displaystyle \)	\(\displaystyle 42\)	\(=\)	\(\displaystyle 21 \cdot 2\)	\(\displaystyle \)	\(\displaystyle \)	\(\displaystyle \)
	\(\displaystyle \)	\(\displaystyle \)	\(\displaystyle \)	\(\displaystyle \)	\(\le\)	\(\displaystyle 12345\)	\(\displaystyle \)	\(\displaystyle \)	\(\displaystyle \)	since $21 \cdot 2 = 42 \le 12345$