Abstract
We prove an analogous of Stein theorem for rational functions in several variables: we bound the number of reducible fibers by a formula depending on the degree of the fraction.
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Bodin, A. Reducibility of rational functions in several variables. Isr. J. Math. 164, 333–347 (2008). https://doi.org/10.1007/s11856-008-0033-2
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DOI: https://doi.org/10.1007/s11856-008-0033-2