diff --git a/doc/rcfs.pdf b/doc/rcfs.pdf
index 5ac075e3c1a39d5ff18711888db9c7c1ce28d244..3ae1ecde1bc284b22f09889ee8a53e2803ec611f 100644
Binary files a/doc/rcfs.pdf and b/doc/rcfs.pdf differ
diff --git a/doc/rcfs.tex b/doc/rcfs.tex
index 2c1ab34625f65dca04d9a350e54c9180b2bbecf7..4bd7af6d9ce499a1569cda3e1bc57c4ce3b77ba7 100644
--- a/doc/rcfs.tex
+++ b/doc/rcfs.tex
@@ -402,7 +402,6 @@ If the matrices and vectors in \eqref{eq:regWLS} have the structure
 \begin{equation*}
 	\bm{W}=\begin{bmatrix}\bm{W}_{1}&\bm{0}\\\bm{0}&\bm{W}_{2}\end{bmatrix},\quad 
 	\bm{A}=\begin{bmatrix}\bm{A}_{1}\\\bm{A}_{2}\end{bmatrix},\quad
-	\bm{x}=\begin{bmatrix}\bm{x}_{1}\\\bm{x}_{2}\end{bmatrix},\quad
 	\bm{b}=\begin{bmatrix}\bm{b}_{1}\\\bm{b}_{2}\end{bmatrix},
 \end{equation*}
 we could consider an optimization problem using only the first part of the matrices, which would yield the estimate