George Henri Halphen (30 October 1844, Rouen – 23 May 1889, Versailles) was a French mathematician. He did his studies at École Polytechnique (X 1862). He was known for his work in geometry, particularly in enumerative geometry and the singularity theory of algebraic curves, in algebraic geometry. He also worked on invariant theory and projective differential geometry.

[edit] See also

• Bézout's theorem
• Cramer's paradox

[edit] External links

• O'Connor, John J.; Robertson, Edmund F., "Georges Henri Halphen", MacTutor History of Mathematics archive .
• Jewish Encyclopedia
• (French) Biography on the Université de Rouen site

[edit] References

• Cajori, Florian (1991). A History of Mathematics. New York: Chelsea. ISBN 0-8218-2102-4.  (org. published by Macmillan, 1919)

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