diff --git a/Algebraic_kernel_d/doc_tex/Algebraic_kernel_d_ref/AlgebraicKernel_d_2_AlgebraicReal_2.tex b/Algebraic_kernel_d/doc_tex/Algebraic_kernel_d_ref/AlgebraicKernel_d_2_AlgebraicReal_2.tex
index a19831db76d..c726a9a55ba 100644
--- a/Algebraic_kernel_d/doc_tex/Algebraic_kernel_d_ref/AlgebraicKernel_d_2_AlgebraicReal_2.tex
+++ b/Algebraic_kernel_d/doc_tex/Algebraic_kernel_d_ref/AlgebraicKernel_d_2_AlgebraicReal_2.tex
@@ -6,8 +6,8 @@ A model of this concept represents the roots of a system of two polynomial
 equations in two variables \ccc{x} and \ccc{y} that are models of 
 concept \ccc{AlgebraicKernel_d::Polynomial_2}.
 
-The model is required to be \ccc{LessThanComparable} with respect to a 
-lexicographic order.
+The model is required to be \ccc{LessThanComparable} with respect to 
+the lexicographic order according to \ccc{x} and \ccc{y}.
 
 \ccRefines
 \ccc{DefaultConstrctible}\\