Hans Albert Einstein as slide shows. He also loved music, as denoted on his gravestone, and he played flute and piano. Hans Albert Einstein died due to heart failure on July 26, 1973 (aged 69) in Woods Hole, Massachusetts, US. Hans Albert Einstein Hans Albert Einstein ( ; May 14, 1904 – July 26, 1973) was a Swiss-American engineer and educator, the second child and first son of Albert Einstein and Mileva Marić. Hans A. Einstein was a professor of Hydraulic Engineering at the University of California, Berkeley, and was recognized for his research on sediment transport. His papers are held at the
Albert Einstein may be derived from the Einstein equations. Since the equations of general relativity are non-linear, a lump of energy made out of pure gravitational fields, like a black hole, would move on a trajectory which is determined by the Einstein equations themselves, not by a new law. So Einstein proposed that the path of a singular solution, like a black hole, would be determined to be a geodesic from general relativity itself. This was established by Einstein, Infeld, and Hoffmann for pointlike objects without angular momentum, and by Roy Kerr for spinning objects. In a 1905 paper, Einstein postulated that