Upper and Lower Almost Contra-$(\tau_1,\tau_2)$-continuity

This paper introduces new classes of multifunctions between bitopological spaces, namely upper almost contra-$(\tau_1,\tau_2)$-continuous multifunctions and lower almost contra-$(\tau_1,\tau_2)$-continuous multifunctions. Furthermore, several characterizations of upper almost contra-$(\tau_1,\tau_2)$-continuous multifunctions and lower almost contra-$(\tau_1,\tau_2)$-continuous multifunctions are considered.