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Recursive domain equations have natural solutions. In particular there are domains defined by strictly positive induction. The class of countably based domains gives a computability theory for possibly non-countably based topological spaces. A qcb0 space is a topological space characterized by its strong representability over domains. In this paper, we study strictly positive inductive definitions for qcb0 spaces by means of domain representations, i.e. we show that there exists a canonical fixed point of every strictly positive operation on qcb0 spaces.