<chapter id="examples"> <title >Esempi per &step;</title > <para >- </para> <sect1 id="first"> <title >first.step: primo esempio</title> <para >- </para> </sect1> <sect1 id="brownian"> <title >brownian.step</title> <para >- </para> </sect1> <sect1 id="pendulum"> <title >doublependulum.step</title> <para >- </para> </sect1> <sect1 id="gas"> <title >gas.step</title> <para >- </para> </sect1> </chapter>