Mathematical instruments in the writings and in the hand of practitioners: geometric square, from Gerbert to Gall (Q2836322)
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scientific article; zbMATH DE number 6183038
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | Mathematical instruments in the writings and in the hand of practitioners: geometric square, from Gerbert to Gall |
scientific article; zbMATH DE number 6183038 |
Statements
2 July 2013
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mathematical instruments
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geometric square
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Gerbert d'Aurillac
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Chrisostomus Gall
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0.79900014
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Mathematical instruments in the writings and in the hand of practitioners: geometric square, from Gerbert to Gall (English)
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The geometric square (quadratum geometricum), a portable instrument in the form of a square frame for ascertaining distances and heights by measuring angles, was first presented by Gerbert d'Aurillac (Pope Sylvester II, 946--1003) in his \textit{Geometrica}. Since that time, many European mathematicians discussed the properties of this instrument, and later there appeared producers of such a useful device. The present author elucidates the question, giving special attention to the contribution made by Portuguese priest Chrisostomus Gall S.J. (1586--1643).
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