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Who knows what this German stamp is?
The stamp on your drawing is a commemorative stamp of the Gauss Project, issued by the Federal Republic of Germany (that is, West Germany) with the number 1977. 4. 14, with 1 stamp.

The main map of stamps is a mathematical definition of Gaussian-a schematic diagram of Gaussian plane; At the bottom is the name and date of birth and death of Gauss-Karl F Gauss 1777- 1855 (Karl F Gauss 1777- 1855).

Johann Carl Friedrich Gauss (German: John karl friedrich Gao? )。 1777 was born in Brunswick, Germany on April 30th; 1855 died in gottingen on February 23rd. Germany's famous mathematician, physicist, astronomer and geodetic scientist. Gauss is one of the founders of modern mathematics. He, Newton and Archimedes are considered as the three great mathematicians in history. It has a great influence in history, and can be juxtaposed with Archimedes, Newton and Euler, and is known as the "prince of mathematics".

This is a good stamp for collecting math (family) questions, science (family) questions, celebrity questions and so on. Keep it well!