::
Purtroppo no:
`! A was supposed to be here.
\pi
l.169 …}{v}{\frac{1}{2}(v\otimes 1-Jv\otimes i)}
I was expecting to see \hbox or \vbox or \copy or \box or
something like that. `
Tanto piu’ che sulla documentazione di xypic e’ riportato esattamente **[r] e **[l]… Non capisco…
