Ah scusate Voi mi chiedevate il preambolo….vi posto tutto il file tesi.lyx così che forse vi possa essere d aiuto e magari trovare mica anche altri errori ..sempre mille grazie dell’aiuto
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%% LyX 2.0.0 created this file. For more info, see http://www.lyx.org/.
%% Do not edit unless you really know what you are doing.
\documentclass[12pt,oneside,english,italian,bibliography=totoc,index=totoc,BCOR7.5mm,captions=tableheading]{book}
\usepackage[T1]{fontenc}
\usepackage[latin9]{inputenc}
\usepackage{listings}
\usepackage{geometry}
\geometry{verbose,tmargin=3cm,bmargin=3cm,lmargin=3cm,rmargin=3cm,headsep=1cm}
\setcounter{secnumdepth}{3}
\usepackage{color}
\usepackage{babel}
\usepackage{array}
\usepackage{float}
\usepackage{textcomp}
\usepackage{multirow}
\usepackage{amsthm}
\usepackage{amsmath}
\usepackage{graphicx}
\usepackage{setspace}
\usepackage{esint}
\onehalfspacing
\usepackage[unicode=true,
bookmarks=true,bookmarksnumbered=true,bookmarksopen=false,
breaklinks=false,pdfborder={0 0 1},backref=false,colorlinks=true]
{hyperref}
\hypersetup{pdftitle={La Guida dell'Utente di LyX},
pdfauthor={LyX Team},
pdfsubject={LyX},
pdfkeywords={LyX},
linkcolor=black, citecolor=black, urlcolor=blue, filecolor=blue, pdfpagelayout=OneColumn, pdfnewwindow=true, pdfstartview=XYZ, plainpages=false}
\makeatletter
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% LyX specific LaTeX commands.
\newcommand{\noun}[1]{\textsc{#1}}
\DeclareRobustCommand{\greektext}{%
\fontencoding{LGR}\selectfont\def\encodingdefault{LGR}}
\DeclareRobustCommand{\textgreek}[1]{\leavevmode{\greektext #1}}
\DeclareFontEncoding{LGR}{}{}
\DeclareTextSymbol{\~}{LGR}{126}
%% Because html converters don't know tabularnewline
\providecommand{\tabularnewline}{\\}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% Textclass specific LaTeX commands.
\numberwithin{equation}{section}
\numberwithin{figure}{section}
\theoremstyle{plain}
\newtheorem{thm}{\protect\theoremname}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% User specified LaTeX commands.
%%
% NON ALTERARE QUESTO PREAMBOLO!!!
%
% Ho progettato questo preambolo per garantire la stampa finale
% della Guida dell'Utente. Se pasticciate con questo preambolo,
% parti della Guida dell'Utente possono non venir stampate come
% previsto. Se avete problemi nella conversione LaTeX di questo
% file, contattate il gruppo per la documentazione
% email: lyx-docs@lists.lyx.org
\usepackage{ifpdf} % part of the hyperref bundle
\ifpdf % if pdflatex is used
% set fonts for nicer pdf view
\IfFileExists{lmodern.sty}{\usepackage{lmodern}}{}
\fi % end if pdflatex is used
% the pages of the TOC is numbered roman
% and a pdf-bookmark for the TOC is added
\let\myTOC\tableofcontents
\renewcommand\tableofcontents{%
\frontmatter
\pdfbookmark[1]{\contentsname}{}
\myTOC
\mainmatter }
% redefine the \LyX macro for PDF bookmarks
\def\LyX{\texorpdfstring{%
L\kern-.1667em\lower.25em\hbox{Y}\kern-.125emX\@}
{LyX}}
% define a short command for \textvisiblespace
\newcommand{\spce}{\textvisiblespace}
%\addtoreset{equation}{section}
%\numberwithin{equation}{section}
\makeatother
\addto\captionsenglish{\renewcommand{\theoremname}{Theorem}}
\addto\captionsitalian{\renewcommand{\theoremname}{Teorema}}
\providecommand{\theoremname}{Teorema}
\begin{document}
\begin{frontmatter}
\input{frontpage.tex}
\input{dedica.tex}
\input{indici.tex}
\end{frontmatter}
\begin{mainmatter}
\input{introduzione.tex}
\input{Cap3-La_selezione_dinamica_multiperiodale.tex}
\input{Cap4-Un_caso_pratico_l_applicazione_del_modello.tex}
\input{Cap5-Conclusioni.tex}
{\small \input{\string”Allegato 1.tex\string”}}{\small \par}
\input{bibliografia.tex}
\end{mainmatter}
\begin{backmatter}
\input{ringraziamenti.tex}
\end{backmatter}
\end{document}
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