The `` rational operations '' are the addition and multiplication of formal series , together with iteration . The `` rational operations '' are the addition and multiplication of formal series , together with the iteration .
"Operasi rasional" 'adalah penambahan dan pendaraban siri formal, bersama-sama dengan lelaran. "Operasi rasional" 'adalah penambahan dan pendaraban siri formal, bersama-sama dengan lelaran.