来自在线整数百科全书的问候语!http://oeis.org/ Search: id:a277069 Showing 1-1 of 1 %I A277069 %S A277069 9,9,1,1,2,0,1,4,7,9,9,1,8,7,7,4,0,4,6,9,5,2,5,2,3,9,8,9,0,4,7,7,4,4, %T A277069 1,8,7,2,5,9,9,7,7,6,4,1,9,5,1,3,1,5,7,5,6,7,2,3,7,3,1,2,9,2,5,9,5,2, %U A277069 5,4,7,5,9,9,9,8,2,5,0,9,0,9,0,5,3,1,6,5 %N A277069 Decimal expansion of the real part of the root of the function x^y = y. %C A277069 This value is negative. %C A277069 It is not known if this number has a closed form. %C A277069 This root occurs on the real component of the function x^y = y for x values which are all real. %F A277069 Original fixed point function is of the form: x^y = y. When solved for y: y = -ProductLog(-log(x))/log(x). %e A277069 -99.1120147991877404695252398904774418725997764195131575672373129... %t A277069 FindRoot[Re[-ProductLog[-Log[x]]/Log[x]], {x, -100, -99}, WorkingPrecision -> 261] %Y A277069 Cf. A277067. %K A277069 nonn,cons %O A277069 2,1 %A A277069 _David D. Acker_, Sep 27 2016 # Content is available under The OEIS End-User License Agreement: HTTP:/OEIS.Org/许可证