eint -- exponential integral

Synopsis

• Usage:

  eint x

• Inputs:
  • x
• Outputs:
  • a real number, the exponential integral of x

Description

i1 : eint 2

o1 = 4.95423435600189

o1 : RR (of precision 53)

See http://en.wikipedia.org/wiki/Exponential_integral.