Abstract
We obtain necessary and sufficient conditions for the change of the variable in a one-dimensional Lebesgue integral in the case when the substituting function is quasibijective (see Definition 1).
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P. de Lucia, “Sulla caratterizzazione delle funzioni numeriche di una variabile quasi ovunque derivabili rispetto ad un'altra,” Ricerche Mat.,19, No. 1, 26–47 (1970).
D. E. Varberg, “Change of variables in multiple integrals,” Amer. Math. Monthly,78, No. 1, 42–45 (1971).
S. Saks, Theory of the Integral, Hafner, New York (1937).
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Translated from Matematicheskie Zametki, Vol. 13, No. 5, pp. 747–758, May, 1973.
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Orlov, V. Change of variable in the one-dimensional Lebesgue integral. Mathematical Notes of the Academy of Sciences of the USSR 13, 446–452 (1973). https://doi.org/10.1007/BF01147476
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DOI: https://doi.org/10.1007/BF01147476