\batchmode

\documentstyle{article}

\let\providecommand\newcommand


\newtheorem{theorem}{Theorem}\newtheorem{corollary}[theorem]{Corollary}\newtheorem{lemma}[theorem]{Lemma}\newtheorem{proposition}[theorem]{Proposition}\newtheorem{assumption}{Assumption}\newtheorem{definition}{Definition}\newtheorem{question}{Question}\newtheorem{example}{Example}



%
\providecommand{\pUno}{{\tt Data\-Bases}}%
\providecommand{\pDue}{{\tt Algebra}}%
\providecommand{\pTre}{{\tt Non\-Mo\-no\-to\-nicRea\-so\-ning}}%
\providecommand{\pQuattro}{{\tt Ma\-the\-ma\-ti\-cal\-Lo\-gic}}%
\providecommand{\pCinque}{{\tt Com\-pu\-terArchi\-tectures}}%
\providecommand{\zUno}{{\tt Reaso\-ning\-About\-Knowledge}}%
\providecommand{\zDue}{{\tt Compu\-tational\-Comp\-lexity}}
%
\providecommand{\nop}[1]{}
\newcounter{rmexample}
%
\newenvironment{rmexample}
{\addtocounter{rmexample}{1}
\medskip
\noindent{\bf Example~\arabic{rmexample}}:}{\ifhmode\nobreak{\raisebox{-.2ex}{$\Diamond$}}

\fi\smallskip}
\long


       %"\ddtre x \wedge n" makes "x_1 \wedge ... \wedge x_n"


                    % fixed part (X-or formulae)

                   % extension

           % extension with index


%
\providecommand{\pair}[2]{\langle #1, #2 \rangle}%
\providecommand{\deftheory}[2]{\langle #1, #2 \rangle}

                  % Model checking e' P

               % Model checking e' NP

           % Model checking e' coNP


                  % Inference e' P

               % Inference e' NP

           % Inference e' coNP



            %<--- of iff-proof







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\providecommand{\selectlanguage}[1]{}%
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