Catalan's Constant, approximately 0.915... It is defined to be the series where terms are (-1^k)/((2*k+1)^2), where
k ranges from 0 to infinity.
See Mathworld for more information.
Euler's Constant gamma. Sometimes called the Euler-Mascheroni constant.
The Golden Ratio.
Free fall acceleration at sea level.
See Wikipedia for more information.
The base of the natural logarithm. e^x is the exponential function exp. This is the number approximately 2.71828182846...
The number pi, that is the ratio of a circle's circumference to its diameter. This is approximately 3.14159265359...