Mathematician:James Gregory

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Scottish mathematician and astronomer best known for designing the Gregorian telescope.

Made advances in trigonometry, discovering infinite series representations for several trigonometric functions.

Gave both the first published statement and proof of the Fundamental Theorem of Calculus, but only for a limited class of functions.

The uncle of David Gregory, who inherited his papers on his death.




  • Born: November 1638 in Drumoak (near Aberdeen), Scotland
  • Died: October 1675 in Edinburgh, Scotland

Theorems and Definitions

Mercator's Constant, for Nicholas Mercator
the alternating harmonic series

Results named for James Gregory can be found here.

Definitions of concepts named for James Gregory can be found here.


Also known as

James Gregory's surname was originally spelt in the Scots manner as Gregorie.