LaTeX.org

It worked ! Many thanks to kaiserkarl13 and this forum. See result at : https://drpartha.org.in/drpartha/tall-brace-right.png

I need a small help from this forum.

I have a math expression spanning many lines (a continued fraction) :

\begin{equation}
1+
\cfrac {1}{1+
\cfrac {1}{1+
\cfrac {1}{1+
\cfrac {1}{1+
\cfrac {1}{1+ \dots
}}}}}
\end{equation}

I would like to add a tall curly brace } spanning the entire expression ...

I am trying to typeset a bunch of equations using \align. I get a weird output. Here is a MWE:

\parbox{0.5\textwidth}{
\begin{align}
\dfrac{15}{5} &= 42/14 &= 3\\
\dfrac{26}{65} &= \dfrac{2\cancel{6}}{\cancel{6}5} &= \dfrac{2}{5}\\
\dfrac{19}{95} &= \dfrac{1\cancel{9}}{\cancel{9}5} &= \dfrac{1}{5 ...

I happen to use the LaTeX front-end Kile. I tried to compile via the command line, But there are too many alerts/messges. It will mean looking for a needle in the haystack. I guess I will have to explore the aux file carefully, using some text editor. Any better way to explore ?

I have a document (book class) which is built using several \input documents. When I compile this book, I get a warning/alert "There were multiply defined labels". What is the least-effort way of locating these "multiply defined labels" ?
Idem "Citation missing" alert ? I will be grateful for any ...

I followed the hint given by Stefan. The problem just vanished. I suspect that I had put a \pagetstyle{empty} somehwhere in one of the pages I had \input in the top level document. Thanks to all, I can now sleep in peace.

YES, the documentclass I use is :: \documentclass[12pt,a5paper, twoside, openany]{book}
In any case, book class is two sided by default. I suspect, the problem comes from the fact
that this book uses lot of \include files (one for each chapter). Maybe one/or more of these files is
causing a ...

Will create a MWE soon. Pls hangon.

I notice that my even pges are not numbered . Why ?
I am using the document class ::

%\documentclass[a4paper,12pt]{book}
\documentclass[12pt,a5paper, twoside, openany]{book}

with \pagestyle{plain}

Strangely, all odd pages numbers are displayed correctly.

I am not using fancyheader anywhere ...

I tried the code exactly as you gave it, just to see what it gives:
\documentclass{article}
\usepackage{blindtext}
\usepackage{background}
\usetikzlibrary{calc}
\backgroundsetup{angle = 0, scale = 1, vshift = -2ex,
contents = {\tikz[overlay, remember picture]
\draw [rounded corners = 20pt, line ...