Riddle's fifth postulate (1962)

Trainee wipes the board.

Pupil is going to the party.

Pupils discuss the entries in the notebook.

Pupils go out of the class.

Thwarted writing on the blackboard.

Pupils go down the stairs.

View of the Kazan Kremlin.

Boys go to the University of Kazan.

Professor of Kazan University B.L.Laptev.

Pupils talk with the professor in his office.

Learner identifies geometric models on the shelves.

Professor leafing through a notebook, rises from the table, takes a book from the shelf and returned to the students.

B.L.Laptev tells students about Euclid.

Figure: Euclid.

Page textbook.

Animation: geometric scheme against the background of the pages of the textbook.

Professor talks with students.

Picture: scientist solves the problem.

Animation: portrait of Omar Khayyam and the pages of ancient manuscripts.

Cover Sheet "Conatus geometricus".

Figure: Girolamo Saccheri.

Portraits of famous mathematicians.

Animation: an Hungarian mathematician Farkas Bolyai to his son.

Portrait F.Boyyai.

Animation: fragment of a letter among the drawings.

Portrait of Janos Bolyai.

Professor B.L.Laptev with the students in the study.

Portraits: Lobachevsky, K.F.Gauss, Ya.

Boyyai.

Animation: the life and work of scientists in the drawings.

Tools geometers, textbook and diagrams on the table.

Animation: portrait of Lobachevsky and dials.

The rise of the spiral staircase.

Telescope at the observatory.

Animation: drawing, clouds, maps, earth in space, starry sky in the picture in the office.

Portrait of Lobachevsky.

Pages with formulas and diagrams.

Animation: Kazan University, snowfall.

Multrabota beats message NILobachevsky of Physics and Mathematics Department of the University of February 11, 1826: Scientists in the audience, geometric figures, diagrams and formulas discontent secular and ecclesiastical authority.

Portraits of scientists on the office wall.

Pupils ask questions to the professor.

Mountain view, top view.

Professor B.L.Laptev shows students drawings and models of pseudo-spherical surfaces E.Beltrami.

Under the guidance of Professor pupils practice in Lobachevsky geometry model Beltrami.

Work Lobachevsky in the magazine "Kazan Herald" for January 1829.

Picture: view of the city.

Portrait Ya.

Boyyai.

Work Ya.

Boyyai.

Animation: fragments of life and Ya.

Boyyai K.F.Gaussa in drawings.

Pages works Lobachevsky.

View of the Kazan Kremlin.

The building of the University of Kazan.

Portrait of Lobachevsky.

Daguerreotype Lobachevsky in the last year of life.

Proceedings N.L.Lobachevskogo stacked in the shape of a spiral staircase.

The title page of one of the publications.

Models pseudospheres Beltrami.

Animation: ships in space.

Pupils at the monument Lobachevsky in Kazan.