Template:Are You Sure/March 30: Difference between revisions

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[[File:Banach-Tarski Paradox.svg|thumb|175px|link=Banach–Tarski paradox (nonfiction)|The [[Banach–Tarski paradox (nonfiction)|Banach–Tarski paradox]] is a theorem in set-theoretic geometry, which states:<br><br>
• ... that mathematician '''[[Stefan Banach (nonfiction)|Stefan Banach]]''' is the namesake of Banach spaces, Banach algebras, the [[Banach–Tarski paradox (nonfiction)|Banach–Tarski paradox]], the Hahn–Banach theorem, the Banach–Steinhaus theorem, the Banach-Mazur game, the Banach–Alaoglu theorem, and the Banach fixed-point theorem?
Given a solid ball in 3‑dimensional space, there exists a decomposition of the ball into a finite number of disjoint subsets, which can then be put back together in a different way to yield two identical copies of the original ball. Indeed, the reassembly process involves only moving the pieces around and rotating them without changing their shape. However, the pieces themselves are not "solids" in the usual sense, but infinite scatterings of points. The reconstruction can work with as few as five pieces.
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The reason the Banach–Tarski theorem is called a paradox is that it contradicts basic geometric intuition.]]


• ... that mathematician '''[[Stefan Banach (nonfiction)|Stefan Banach]]''' is the namesake of Banach spaces, Banach algebras, the [[Banach–Tarski paradox (nonfiction)|Banach–Tarski paradox]], the Hahn–Banach theorem, the Banach–Steinhaus theorem, the Banach-Mazur game, the Banach–Alaoglu theorem, and the Banach fixed-point theorem?
• ... that physicist '''[[C. V. Boys (nonfiction)|Charles Vernon Boys]]''' achieved recognition as a scientist for his invention of the fused quartz fiber torsion balance, which allowed him to measure extremely small forces, and that Boys made the fused quartz fibers for his instrument by attaching a quartz rod to a crossbow quarrel, heating the rod to the point of melting, and firing the crossbow, and that by this means he produced fiber so thin that it could not be resolved with an optical microscope?


• ... that physicist '''[[C. V. Boys (nonfiction)|Charles Vernon Boys]]''' achieved recognition as a scientist for his invention of the fused quartz fiber torsion balance, which allowed him to measure extremely small forces, and that Boys made the fused quartz fibers for his instrument by attaching a quartz rod to a crossbow quarrel, heating the rod to the point of melting, and firing the crossbow. By this means he produced fiber so thin that it could not be resolved with an optical microscope?
• ... that mathematician '''[[Harold Scott MacDonald Coxeter (nonfiction)|Harold Scott "Donald" Coxeter]]''' composed music in his youth and was an accomplished pianist at the age of 10, and that Coxeter felt that mathematics and music were intimately related, outlining his ideas in a 1962 article on "Mathematics and Music" in the ''Canadian Music Journal''?


• ... that mathematician '''[[Adam Ries (nonfiction)|Adam Ries]]''' wrote several books on practical mathematics, including ''Rechnung auff der linihen'' ("Reckoning on the Line", 1518), which describes calculation on a calculating board, a kind of abacus, and that according to the foreword, the second edition was expressly intended for children?
• ... that mathematician '''[[Adam Ries (nonfiction)|Adam Ries]]''' wrote several books on practical mathematics, including ''Rechnung auff der linihen'' ("Reckoning on the Line", 1518), which describes calculation on a calculating board, a kind of abacus, and that according to the foreword the second edition was expressly intended for children?

Latest revision as of 21:36, 5 February 2022

• ... that mathematician Stefan Banach is the namesake of Banach spaces, Banach algebras, the Banach–Tarski paradox, the Hahn–Banach theorem, the Banach–Steinhaus theorem, the Banach-Mazur game, the Banach–Alaoglu theorem, and the Banach fixed-point theorem?

• ... that physicist Charles Vernon Boys achieved recognition as a scientist for his invention of the fused quartz fiber torsion balance, which allowed him to measure extremely small forces, and that Boys made the fused quartz fibers for his instrument by attaching a quartz rod to a crossbow quarrel, heating the rod to the point of melting, and firing the crossbow, and that by this means he produced fiber so thin that it could not be resolved with an optical microscope?

• ... that mathematician Harold Scott "Donald" Coxeter composed music in his youth and was an accomplished pianist at the age of 10, and that Coxeter felt that mathematics and music were intimately related, outlining his ideas in a 1962 article on "Mathematics and Music" in the Canadian Music Journal?

• ... that mathematician Adam Ries wrote several books on practical mathematics, including Rechnung auff der linihen ("Reckoning on the Line", 1518), which describes calculation on a calculating board, a kind of abacus, and that according to the foreword the second edition was expressly intended for children?

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