Danilo Blanuša

Danilo Blanusa, 1903-1987, Croatian mathematician, professor at the University of Zagreb.

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. Where Q0 and T0 are the corresponding classical values, and a=(1-v2/c2)1/2

                     in relation     --->   Q=Q0a, T=T0a 
                                                                                                realy 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 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 scientific literature. He tackled the the problem of the four colours'' and discovered the only seconds solution. In mathematical terms, the graphicone must have the characteristic that from every node there are three branches coming out whom it is impossible to colour in three different colours so that all three colours would come out from one point. This graph was published in 1946. The English term "snark" meaning - mysteriou, imaginary beings is mathematical slang for a solution since these graphs are very difficult to discover. This discovery made by Blanuša has triggered a whole new area of the graph theory, and made Blanuša one of the world famous mathematicians coming from Zagreb.

Blanusa's most important work is related to isometric immersions of two-dimensional Lobacevski plane into six-dimensional Euclidean space and generalizations. His result are included in Japanese mathematical encyclopedia Sugaku jiten in  Tokyo,  ( 1962) publishe by Iwanami shoten

• Croatian Mathematical society
• Blanusa Graph