Alexei Semenov may refer to:
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Alexei Semenov (mathematician)
Alexei (also Aleksei, Alexey, Aleksey) L. Semenov (also Semyonov, Semёnov) (Russian: Алексей Львович Семенов; born 1950) is a Russian mathematician, educationalist, Academician of the Russian Academy of Sciences, Academici ...
(born 1950) is a Russian mathematician
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Alexei Semenov (ice hockey) (born 1981) is a Russian former professional ice hockey defenceman
{{hndis, Semenov, Alexei