“…Let x : I → E 3 be a regular curve in E 3 according to Frenet frame {t, n, b} with non-zero curvatures κ, τ , and y : I 1 → E 3 be a Bertrand mate curve of x according to Frenet frame {t 1 , n 1 , b 1 } with non-zero curvatures κ 1 , τ 1 . Then the curve y can be written as[5], Let x(s) and y(s 1 ) be regular curves in E 3 with the Frenet frames {t, n, b} and {t 1 , n 1 , b 1 } according to arc-length parameter s and s 1 , respectively. If the pair (x, y) are the Bertrand curve pair, we can write the following results…”