A discontinuous function with a connected closed graph
Acta Universitatis Carolinae. Mathematica et Physica, Tome 44 (2003) no. 2, pp. 73-77.

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Classification : 26B05, 54C10, 54C30, 54G20 
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Jelínek, Jiří. A discontinuous function with a connected closed graph. Acta Universitatis Carolinae. Mathematica et Physica, Tome 44 (2003) no. 2, pp. 73-77. https://geodesic-test.mathdoc.fr/item/AUCMP_2003__44_2_a7/