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...countries' [[Soviet-type economic planning|economic planning]] in the 20th century. According to economists such as [[George Stigler]] and [[Robert Solow]], M ...onomist of Marx's time," observed [[Robert Heilbroner]] in ''[[The Worldly Philosophers]]'', "although future events have certainly indicated his prediction of suc ...

...peared throughout history, including the work of [[Desargues]] in the 17th century, all the way back to the implicit use of [[spherical geometry]] to understa ...the theory of [[manifold]]s and [[Riemannian geometry]]. Later in the 19th century, it appeared that geometries without the [[parallel postulate]] ([[non-Eucl ...

...me more mathematical as a discipline throughout the first half of the 20th century, but introduction of new and generalized techniques in the period around th ...tics in the service of social and economic analysis dates back to the 17th century. Then, mainly in [[Holy Roman Empire|German]] universities, a style of ins ...

...of the House of Representatives to honor the life and achievements of 19th Century Italian-American inventor Antonio Meucci, and his work in the invention of ...Amati/Amaticello.html|title=Violoncello by Andrea Amati, Cremona, Mid-16th Century|website=collections.nmmusd.org|access-date=2019-11-05}}</ref> ...