# Breadcrumbs to equation number in Lyx [closed]

I am using Lyx and I am a novice but I am hooked to Lyx. I have zero background in Latex.

Question 1: How can I add breadcrumbs ....... to my equation numbers in Lyx so that when I view a pdf, I get the equation followed by ......... followed by equation number.

Question 2: How do I make my equation numbers (17-1) where 17 is the chapter number and 1 is the first equation in chapter 17 in Lyx.

• Hi and welcome. Do not ask two questions at the same time, this does not allow search engines to do a targeted search. If you have two questions, ask them separately. – AndréC Jun 21 at 21:20
• Apologies and thank you for the reminder. – deepsen Jun 22 at 7:35

Equation numbers displayed as you want are simple to obtain, redefining \theequation.

As to the dots to the equation number, you can load the dotseqn package, but be aware that

1. it works only for the equation environment (and eqnarray, not recommended for spacing reasons, not with multilined environments from amsmath;
2. the equation environments will be flushleft.

Demo:

\documentclass{report}
\usepackage{mathtools}
\usepackage{dotseqn}
\renewcommand{\theequation}{\thechapter-\arabic{equation}}

\begin{document}

\setcounter{chapter}{5}

Some text. Some more text.
$$\label{eq-test} x = \frac{-b\pm\sqrt{b^2-4ac}}{2a}$$

\begin{align}\label{eq-test1}
\Delta & =b^2-4ac \\
x & = \frac{-b\pm\sqrt{\Delta}}{2a}\label{eq-test2}
\end{align}

\end{document}
`

• It works. Only if there was a way to have equation (5-1) be centered like the other equations with the breadcrumbs. – deepsen Jun 22 at 7:42
• I upvoted but since I am a newbie my vote does not show :( – deepsen Jun 22 at 8:17