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File:Letter Goldbach-Euler signature.svg

File:Letter Goldbach-Euler signature.svg

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ملف:Letter Goldbach-Euler signature.svg
DescriptionLetter Goldbach-Euler signature.svg Deutsch: Christian Goldbachs Unterschrift Date 12 June 1742 11 April 2015 (vectorization) Source This file
ملف:Letter Goldbach-Euler-signature.jpg
DescriptionLetter Goldbach-Euler-signature.jpg Català: Christian Goldbach tret de la carta a Euler Deutsch: Handzeichnung von Christian Goldbach Français :