Nikolai Ivanovich Lobachevsky (Vietnamese Wikipedia)

Analysis of information sources in references of the Wikipedia article "Nikolai Ivanovich Lobachevsky" in Vietnamese language version.

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ams.org

Bell, E. T. (1986). Men of Mathematics. Touchstone Books. tr. 294. ISBN 978-0-671-62818-5. Author attributes this quote to another mathematician, William Kingdon Clifford.
Bardi, Jason (2008). The Fifth Postulate: How Unraveling a Two Thousand Year Old Mystery Unraveled the Universe. John Wiley & Sons. tr. 186. ISBN 978-0-470-46736-7. His stubbornness, reported atheism, and genius supported his rise as a champion of the proletariat. To the Soviets, Lobachevsky represented not just the greatness of the common man, emerging from a humble background as he did, he also was a revolutionary of sorts.

Older sources in Russian—e.g., A. F. Popov, "Воспоминания о службе и трудах проф. Казанского университета Н. И. Лобачевского" ("Memoirs of the Service and Work of N. I. Lobachevsky"), 1857—give 1793 rather than 1972, while the Dictionary of Scientific Biography (1970) gives ngày 2 tháng 12 năm 1792. Further information on Lobachevsky's birthdate can be found in: Athanase Papadopoulos (ed.), Nikolai I. Lobachevsky. Pangeometry, European Mathematical Society. 2010, pp. 206–7.
Athanase Papadopoulos (ed.), Nikolai I. Lobachevsky. Pangeometry, European Mathematical Society. 2010, p. 208.

See "К 150-летию со дня смерти Н.И.Лобачевского" ("On the 150th anniversary of the death of N. Lobachevsky") by G. M. Polotovsky, PDF page 3: "Н.И.Лобачевский родился в Макарьевском уезде Нижегородской губернии в 1793 году" (quoting A. F. Popov (1857)); page 4: "[В.Ф.Каган (1943)] местом рождения называет Макарьев".