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Sul centro di gravità del semicerchio eterogeneo con densità proporzionale alla distanza dal centro. - MaRDI portal

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Sul centro di gravità del semicerchio eterogeneo con densità proporzionale alla distanza dal centro. (Q2582940)

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Sul centro di gravità del semicerchio eterogeneo con densità proporzionale alla distanza dal centro.
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    Sul centro di gravità del semicerchio eterogeneo con densità proporzionale alla distanza dal centro. (English)
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    1941
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    \textit{A. Agostini}, Boll. Un. mat. Ital. (2) 2 (1940), 147-171 (F. d. M. 66, 15 (JFM 66.0015.*)) hat auf die interessanten Schwerpunktsbestimmungen in \textit{B. Cavalieri}, Exercitationes geometricae sex, Bologna 1647, hingewiesen. Verf. gibt im Anschluß hieran mittels der Beziehung \(\dfrac{1}{\pi}\approx\dfrac56\left(\dfrac{\sqrt5 - 1}{2}\right)^2\) eine hübsche Näherungskonstruktion für den Schwerpunkt eines Halbkreises, dessen Dichte proportional zum Abstand vom Mittelpunkt ist.
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