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Acta Univ. Carol., Math. Phys. 44, No. 2, 73-77 (2003).

Summary: An example of a discontinuous function on \(\mathbb{R}^2\) that has a closed connected graph is given.

54C30	Real-valued functions in general topology
54C10	Special maps on topological spaces (open, closed, perfect, etc.)
54G20	Counterexamples in general topology
26B05	Continuity and differentiation questions

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