The Leibniz formula converges to this number divided by four and Euler proved that e to this number, times the imaginary number, equals negative one.
Its inverse can be determined using the Chudnovsky formula. Its Engel Expansion has 1,1,1 as its first three digits and the first three digits of its continued fraction are 3, 7 and 15. Its square root is equal to the gamma function of ½ and the square root of twice this number appears in the denominator of the formula for the standard normal distribution. The Leibniz formula converges to this number divided by four and Euler proved that e to this number, times the imaginary number, equals negative one. The Egyptians used 2 to the 8 divided by 3 to the 4 to approximate it, and several proofs have been formulated to show that it is less than 22/7. FTP, name this mathematical constant equal to a circle's circumference divided by its diameter that is often approximated as 3.14.
Its inverse can be determined using the Chudnovsky formula. Its Engel Expansion has 1,1,1 as its first three digits and the first three digits of its continued fraction are 3, 7 and 15.
{Pi}