Jelínek, Jiří A discontinuous function with a connected closed graph. (English) Zbl 1056.54505 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. Cited in 1 Document MSC: 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 PDFBibTeX XMLCite \textit{J. Jelínek}, Acta Univ. Carol., Math. Phys. 44, No. 2, 73--77 (2003; Zbl 1056.54505)