Fuzzy extension of interval-based temporal sub-algebras

In a previous paper, we have proposed a fuzzy extension of Allen's Interval Algebra, called IAfuz, which is able to model soft temporal constraints and uncertainty in a unified way. In this paper, we address the problem of finding tractable sub-algebras of IAfuz, as it has been done in the classical case. In particular, we show that the fuzzy extension of SAc and SA subalgebras are tractable subalgebras of IAfuz