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подлежащему.N.I.Lobachevsky
is a Great Russian mathematician and the creator of non-Euclidean geometry. He
was born on December 1.1792 in Nizhni Novgorod in a poor family. When
N.Lobachevsky was a child, his father died and the family moved to Kazan. There
the boy learned at the "gymnasium" from 1802 to 1807 and in 1807 he
entered Kazan University. At the University N.I.Lobachevsky spent the next
forty years of his life as a student, professor and rector.

Lobachevsky
became interested in mathematics when he was still a schoolboy and be remained
true to this science all his life long.

Lobachevsky did
a lot to make Kazan University a first-rate educational institution of that the
time. At the same time he made extensive researches into mathematics.

On February 23,
1826 a great event took place at Kazan University. N.I.Lobachevsky presented a
paper "A Brief Outline of the Principles of Geometry Strictly Demonstrating
the Theorem of Parallel Lines. That day a new geometrical system, the so-called
non-Euclidean geometry was born. In the paper he attacked the theory which was
the basis of geometry for 2,000 years and made a real revolution in
mathematics.

In the years
that followed Lobachevsky wrote a number of works in the field of algebra and
mathematical analysis. However, nearly nobody understood and recognized his
works at that time. They were recognized only twelve years after his death.

Lobachevsky's
ideas greatly influenced the development not only of geometry and other
mathematical sciences, but also mechanics, physics and astronomy. One
mathematician called Lobachevsky "Copernicus of Geometry"