Tuesday, from 8:30 to 10:30 am office I3 in the Department of Mathematics Piazza di Porta S. Donato, 5.
In any case I suggest to the interested people to check the warning that the professor could post about changes of the schedule in the official notice page.
For urgent questions, students may write an e-mail to firstname.lastname@example.org
Tuesday, January 21, 2020 the professor will be busy. For urgent questions only (only for Tuesday, January 21, 2020) students may looking for the professor going to Cremona room (Math department) at 9 pm.