Background
Sachs, Horst was born on March 27, 1927 in Magdeburg, Germany. Son of Erich and Erna (Griebsch) Sachs.
mathematician historian of mathematics
Sachs, Horst was born on March 27, 1927 in Magdeburg, Germany. Son of Erich and Erna (Griebsch) Sachs.
Diploma in mathematics, Martin Luther University, Halle, Germany, 1953. Doctor Natural Sciences, Martin Luther University, Halle, Germany, 1958. Habilitation, Martin Luther University, Halle, Germany, 1963.
As of 2010, he is professor emeritus at the Institute of Mathematics of the Technische Universität Ilmenau. His encyclopedic book in spectral graph theory, Spectra of Graphs. Theory and Applications (with Dragos Cvetković and Michael Doob) has several editions and was translated in several languages.
Two theorems in graph theory bear his name.
One of them relates the coefficients of the characteristic polynomial of a graph to certain structural features of the graph. Another one is a simple relation between the characteristic polynomials of a graph and its line graph.
(The theory of graph spectra can, in a way, be considered ...)
Fellow: Institute Combinatorics and Applications (Euler medal 2000), International Academy Mathematics Chemistry (honorary).
Married Barbara Nowak, October 10, 1956.