Contents of

_

separation indent medskip _language english _times 2 0 1 plain

Title

Numbering and Labeling equations Author

Alejandro Aguilar-Sierra Standard

A simple equation can be numbered by two ways. The first is invocating the LyX command typewriter math-number default . The corresponding number _float footnote Standard

Or a bold # default mark since true numbering is not yet implemented. float will appear after the right end of the equation.

Standard

_inset Formula

x = y² - 3

(1)

inset

Standard

Usually the equation number will be referred to in the document. It's safer to assign a label to the equation, instead of using a fixed number. Assigning a label to a non-numbered equation will make it numbered automaticall y. With the label bold planck default we can be refer to the equation ( _inset LatexCommand

inset

). Standard

_inset Formula

E = hv

(2)

inset

Standard

In the case of an equation array, every line is sequentially numbered. It's possible to suppress the number for a single line with the command

typewriter math-nonumber default . The cursor must be at the row you want not to be numbered. Standard

_inset Formula

(x + y)(x - y)	=	x² - xy + xy - y²
	=	x² - y²	(3)

inset

Standard

It's possible to label more than one line. From the following array of equations we can refer to the equations ( _inset LatexCommand

inset

) and ( _inset LatexCommand

inset

) using their corresponding labels. Standard 0

_inset Formula

v_k+1	=	w_k + b₁	(4)
w_k+1	=	v_k+1 + b₂	(5)

inset

Standard

To see the final result please preview or print this document. _end