Danilo Blanuša

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Danilo Blanuša (

Croatian Serb mathematician, physicist, engineer and a professor at the University of Zagreb
.

Biography

Blanuša was born in

Ruđer Bošković prize in 1960. He died in Zagreb
.

Mathematics

In mathematics, Blanuša became known for discovering the second and third known snarks in 1946 (the Petersen graph was the first), triggering a new area of graph theory. The study of snarks had its origin in the 1880 work of P. G. Tait, who at that time had proved that the four color theorem is equivalent to the statement that no snark is planar. Snarks were so named later by the American mathematician Martin Gardner in 1976, after the mysterious and elusive object of Lewis Carroll's poem The Hunting of the Snark.

Blanuša's most important works were related to

Lobachevsky) two-dimensional plane into 6-dimensional Euclidean space
and another construction, for all natural numbers , of an -dimensional hyperbolic space into -dimensional Euclidean space. In an earlier work [3] he has exhibited embeddings of -dimensional hyperbolic spaces into a separated (infinite-dimensional) Hilbert space. His other important works are in the theory of the special functions (Bessel functions) and in graph theory. Some of his results are included in the Japanese mathematical encyclopedia Sugaku jiten in Tokyo, published by Iwanami Shoten in 1962.

Physics

His works were mostly related to the theory of relativity. He discovered a mistake in relations for absolute heat Q and temperature T in relativistic phenomenological thermodynamics, published by Max Planck in Annalen der Physik in 1908.

  • Q0 and T0 are the corresponding classical values, and a=(1-v2/c2)1/2
                 in the relation     →   Q=Q0a, T=T0a 
                 really should be    →  Q=Q0/a, T=T0/a

This correction was published in

Glasnik, the journal relating to mathematics, physics and astronomy
in 1947 in the article "Sur les paradoxes de la notion d'énergie". It was rediscovered in 1960, and the correction is still wrongly attributed to H. Ott in the mainstream scientific literature.

See also

References

  1. doi:10.2298/FIL1503375M
  2. doi:10.1007/BF01303796>
  3. ^ D. Blanuša, Eine isometrische und singularitätenfreie Einbettung des -dimensionalen hyperbolischen Raumes im Hilbertschen Raum. Monatsh. f. Math. 57 (1953) 102–108.

External links

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