update

Algebraic_kernel_d/doc_tex/Algebraic_kernel_d_ref/open.tex

@@ -45,5 +45,8 @@
    simplicity as a special case in CA\_2 only. 
 \item AlgebraicReal\_1 - refine: with relative precision is enough. \\
       Moreover, you can use 'refine() until' for absolut prec.
+\item SquareFreeFactorization is not returning an additional constant 
+      factor. This prevents us from providing an extra interface for 
+      algebraic coefficients.
 \end{itemize}