Background
He was the son of Abraham Laub and Anna Maria Schenborn.
He was the son of Abraham Laub and Anna Maria Schenborn.
Next stations were the University of Vienna, the University of Krakow and finally the University of Göttingen, where he studied mathematics under David Hilbert, Woldemar Voigt, Walther Nernst, Karl Schwarzschild and Hermann Minkowski.
Laub, who converted from the Jewish to the Catholic faith and changed his name from "Jakub" into "Jakob Johann", first visited High School in RzeszóWest Soon he established closer contact to Wilhelm Wien, Arnold Sommerfeld, Johannes Stark, and Albert Einstein. When he travelled to Bern in 1908 to visit Einstein (with whom it corresponded later frequently and was friendly) he found him still working as a patent employee.
This he called a "stair joke of history".
In 1909 he became co-worker of Philipp Lenard at the University of Heidelberg. There he worked at the geophysical and astronomical observatory in Louisiana Plata.
Afterwards he obtained a leading position at a Physics Department in Buenos Aires. After accepting the Argentine nationality (with the Spanish first name variant "Jacobo Juan") he began to work in the Diplomatic service of Argentina.
In 1947 he returned to Germany.
In his new home town Freiburg he went into economic troubles and therefore sold a part of his correspondence with Einstein.