Nikolai Lobachevsky

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Nikolai Lobachevsky.

Nikolai Ivanovich Lobachevsky (Lō͘-se-a-gí: Никола́й Ива́нович Лобаче́вский, 1792 nî 12 goe̍h 11856 nî 2 goe̍h 24) sī éng-koè Lō͘-se-a ê sò͘-ha̍k-ka, hui-Eukleidēs kí-hô chá-kî ê hoat-tián-chiá.