isabelle/valid/algebra_amgm_faxinrrp2msqrt2geq2mxm1div2x.thy (10 lines of code) (raw):
(*
Authors: Albert Qiaochu Jiang
*)
theory algebra_amgm_faxinrrp2msqrt2geq2mxm1div2x imports
Complex_Main
begin
theorem algebra_amgm_faxinrrp2msqrt2geq2mxm1div2x:
"\<And>x. (x>0) \<Longrightarrow> 2 - sqrt 2 \<ge> 2 - x - 1/ (2 * x)"
sorry
end