Fig. 1From: Soft document clustering using a novel graph covering approachA pseudostable tuple T i in (a) and a multiple pseudostable tuple M i in (b). Both sets D1 and D2 are stable and some blue paths of length 3 exist between both. The sets \(\mathfrak {P}(T_{i})\) and \(\mathfrak {P}(M_{i})\) consist of all blue nodes which are neither in D1 nor in D2Back to article page