Math Guide

Figure 16: Changing spacing in a matrix formula
Numbering equations
Equation numbering is one of OOo Math’s best hidden features. The steps are simple,
but obscure:
1) Start a new line.
2) Type fn and then press F3.
The fn is replaced by a numbered formula:
E=mc
2
(2)
Now you can double-click on the formula to edit it. For example, here is the Riemann
Zeta function:
z =
∑
n=1
∞
1
n
z
(3)
You can reference an equation (“as shown in Equation (2)”) with these steps:
1) Choose Insert > Cross-reference from the menu bar.
2) On the Cross-references tab (Figure 17), under Type, select Text.
3) Under Selection, select the equation number.
4) Under Format, select Reference.
Click Insert.
Done! If you later add more equations to the paper before the referenced equation,
all the equations will automatically renumber and the cross-references will update.
Tip
To insert the equation number without parentheses around it, choose
Numbering instead of Reference under Format.
Numbering equations 15