The Zel'dovich number is a dimensionless number named after a scientist that died in what year?
Zel'dovich number The Zel'dovich number is a dimensionless number which provides a quantitative value for the activation energy of a chemical reaction which appears in the Arrhenius exponent, named after the Russian scientist Yakov Borisovich Zel'dovich.
Mitchell Feigenbaum Mitchell Jay Feigenbaum (born December 19, 1944) is a mathematical physicist whose pioneering studies in chaos theory led to the discovery of the Feigenbaum constants.