Bolyai was a fellow-student, and Gauss’s only real friend — they corresponded for life. Humboldt inspired Gauss’s researches into magnetism, and sought his help towards a global grid of magnetic observatories. His collaboration with Weber led to the first electric telegraph. Jacobi’s youthful work impressed him, and Dedekind, Cantor and Riemann were among his students, though he disliked teaching. Dirichlet carried his ‘Disquisitiones Arithmeticae’ with him all his life. Germain (under a male pseudonym) conducted a substantial mathematical correspondence with him: other correspondents included Bessel and Olbers.

# Carl Friedrich Gauss

## Carl Friedrich Gauss knew…

- George Airy
- Johann Franz Encke
- Richard Dedekind
- Bernhard Riemann
- August Möbius
- Moritz Cantor
- Franz Taurinus
- Franz Xaver von Zach
- Wilhelm Weber
- Farkas Bolyai
- August Leopold Crelle
- Carl Jacobi
- Friedrich Bessel
- Wilhelm Olbers
- Alexander von Humboldt
- Gustav Lejeune Dirichlet
- Jean-Baptiste Delambre
- David Brewster
- Sophie Germain
- Adolphe Quetelet
- Charles Babbage
- Johann Heinrich von Mädler
- Caroline Herschel