// PiFast, copyright 1999-2001 Xavier Gourdon *************************************** * * * User constant file definition * * * *************************************** Version : 4.0 Constant name : Log2_Basic Comments : Log(2) = 2*arctanh(1/3) = 2 * sum_{n>=0} 1/(2n+1)/3^(2n+1) . Number of series : 1 Series number 0 Beta : 2 Series type : 2 Z : 1/3 Approximate value : Log2_Basic = 0.693147180560