Ergophobia a hospital in New Jersey as early as in the 1860s. Ergophobia is a corollary of Occupational Burnout, which is thought to be the result of long-term unresolvable job stress. The term “burnout” did not come to be used with regularity until the 1970s in the United States. Freudenberger, for example, used it to describe the phenomenon of physical and emotional exhaustion with associated negative attitudes arising from intense interactions when working with people. Later studies on ergophobia and occupational burnout build upon the existing conception of Freudenberger’s research and found the phenomenon was quite common in a variety of
Proof that π is irrational Proof that π is irrational In the 1760's, Johann Heinrich Lambert proved that the number (pi) is irrational: that is, it cannot be expressed as a fraction "a"/"b", where "a" is an integer and "b" is a non-zero integer. In the 19th century, Charles Hermite found a proof that requires no prerequisite knowledge beyond basic calculus. Three simplifications of Hermite's proof are due to Mary Cartwright, Ivan Niven, and Nicolas Bourbaki. Another proof, which is a simplification of Lambert's proof, is due to Miklós Laczkovich. In 1882, Ferdinand von Lindemann proved that is not just irrational, but transcendental as well.