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Points focaux des cercles d'une congruence. - MaRDI portal

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Points focaux des cercles d'une congruence. (Q567781)

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scientific article; zbMATH DE number 2551508
Language Label Description Also known as
English
Points focaux des cercles d'une congruence.
scientific article; zbMATH DE number 2551508

    Statements

    Points focaux des cercles d'une congruence. (English)
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    1932
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    Im Anschluß an die vorstehend besprochene Note von \textit{Gambier} bestimmt Verf. alle Kreiskongruenzen, deren sämtliche Brennpunkte im Unendlich liegen. Die einfachste Kreiskongruenz dieser Art, die dem Verf. von \textit{P. Delens} mitgeteilt wurde, ist folgende: Gegeben sei eine Schar paralleler Ebenen, in jeder Ebene konstruktiert man \(\infty ^1\) konzentrische Kreise. Diese bilden die verlangte Kongruenz.
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