Open continuous functions from the reals to the reals. (English) Zbl 0343.26004
MSC:
26A15 | Continuity and related questions (modulus of continuity, semicontinuity, discontinuities, etc.) for real functions in one variable |
54C10 | Special maps on topological spaces (open, closed, perfect, etc.) |
54C30 | Real-valued functions in general topology |