Spiru Haret was a Romanian mathematician, astronomer and politician of Armenian descent. He made a fundamental contribution to the "n"-body problem in celestial mechanics by proving that using a third degree approximation for the disturbing forces implies instability of the major axes of the orbits, and by introducing the concept of "secular perturbations" in relation to this. As a politician, during his three terms as Minister of Education, … Wikipedia
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Spiru Haret was born on February 15, 1851 in Hanul Conaci , Putna. He was a famous Romanian mathematician, academician, teacher and reformer of the Romanian teaching system. ... As a professor he teaches at the Faculty of Sciences (Mathematic-Physic a people.famouswhy.com/spiru_haret