Category:Pjotr Wassiljewitsch Preobraschenski

**Petr Vasilievich Preobrazhensky**
	Russian mathematician and photographer
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Date of birth	1851; Ulyanovsk
Date of death	c. 1913
Country of citizenship	Russian Empire;
Occupation	mathematician; photographer;
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	Q106080105; VIAF ID: 311358207; NUKAT ID: n2013062245
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