isabelle/valid/mathd_algebra_151.thy (11 lines of code) (raw):

(* Authors: Wenda Li *) theory mathd_algebra_151 imports Complex_Main "HOL-Computational_Algebra.Computational_Algebra" "HOL-Number_Theory.Number_Theory" begin theorem mathd_algebra_151: shows "ceiling (sqrt 27) - floor (sqrt 26) = 1" sorry end