We introduce a property of Q-boundedness on linear transformations bet
ween probabilistic T-normed vector spaces, where Q and T are lower sem
icontinuous triangular norms on the unit interval. We introduce a prop
erty of metric Q-continuity on functions between probabilistic T-metri
c spaces. We show that Q-boundedness and Q-continuity coincide on the
domain of definition of the former property. We show that the already
existing fuzzy topological theories fbr probabilistic T-metric spaces
correspond either to T-m-continuity or to Min-continuity. By investiga
ting the Q-continuity of vector space operations in probabilistic T-no
rmed spaces, we find that the condition Q less than or equal to T is a
useful one. This indicates that the class of probabilistic T-metric s
paces may be the largest possible setting for a rich theory of metric
T-continuity; a fuzzy topological accommodation of which is, at presen
t, available only when T = T-m and when T = Min.