January 9, a postage stamp “The 150th Birth Anniversary of V.A. Steklov (1864-1926), a scientist” to be issued

The main works of Vladimir Andreevich Steklov (1864-1926) pertain to mathematical physics, mechanics, quadrature formulae of approximation theory, asymptotical methods.

The main lifework of Vladimir Andreevich was scientific research: the motion of rigid body in liquid and some problems of the theory of elasticity. He studied expansion of functions in series of special polynomials, gave a general condition of decomposability of functions in a series according to a given system of functions, which is an infinite-dimensional generalization of the Pythagorean theorem, applied the obtained results to solution of various problems, including the solution of Laplace equation (for example, steady-state distribution of temperature in the body obeys the equation).

In 1921 at the initiative of the scientist the Institute of Physics and Mathematics was established under the Academy of Sciences.

The postage stamp depicts the portrait of V.A. Steklov; the background is the Steklov function.

A FDC with cancellation is to be issued as well (Moscow, Saint-Petersburg).

Design: A. Povarikhin.
Face value: 15 rub.
Size of stamp: 42×30 mm, size of sheet: 142×166 mm.
Form of issue: a sheet of 15 (3х5) stamps.
Circulation: 420 thousand stamps  (28 thousand sheets).

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