However, al-Tusi did some of his best work while moving round the different strongholds, and during this period he wrote important works on logic, philosophy, mathematics and astronomy.
Gayunman, al-Tusi ay ang ilan sa kanyang pinakamahusay na trabaho habang lumilipat sa paligid ang iba't-ibang mga strongholds, at panahon na ito siya wrote mahalaga gumagana sa lohika, pilosopiya, matematika at astronomy.