a me dà questi errori
`
deltasun1.tex(3): Errore: ! You can't use `\spacefactor' in vertical mode.
deltasun1.tex(3): Errore: ! Missing $ inserted.
deltasun1.tex(3): Errore: ! LaTeX Error: Something's wrong–perhaps a missing \item.
deltasun1.tex(3): Errore: ! Missing $ inserted.
deltasun1.tex(3): Errore: ! Missing } inserted.
deltasun1.tex(3): Errore: ! Extra }, or forgotten \endgroup.
deltasun1.tex(4): Errore: ! You can't use `\spacefactor' in vertical mode.
deltasun1.tex(4): Errore: ! Missing $ inserted.
deltasun1.tex(4): Errore: ! LaTeX Error: Something's wrong–perhaps a missing \item.
deltasun1.tex(5): Errore: ! You can't use `\spacefactor' in math mode.
deltasun1.tex(5): Errore: ! LaTeX Error: Something's wrong–perhaps a missing \item.
deltasun1.tex(6): Errore: ! You can't use `\spacefactor' in math mode.
deltasun1.tex(11): Errore: ! Missing $ inserted.
deltasun1.tex(1): LaTeX Warning: There were undefined references.
`