سعید رسولی

??-fold left (right) Boolean and MV filters in residuated lattices are introduced and investigated some their properties. Several characterizations of ??-fold left (right) Boolean and MV filters are derived. The relations between ??-fold left (right) Boolean filters and ??-fold left (right) MV filters are investigated and we show that a normal ??-fold left (right) Boolean filter is a normal ??-fold left (right) MV filter.