typo in regression

doc/src/Regression/Regression.do.txt

@@ -346,7 +346,7 @@ C(\bm{\beta})=\frac{1}{n}\sum_{i=0}^{n-1}\left(y_i-\tilde{y}_i\right)^2=\frac{1}
 or using the matrix $\bm{X}$ and in a more compact matrix-vector notation as
 !bt
 \[
-C(\bm{\beta})=\frac{1}{n}\left\{\left(\bm{y}-\bm{X}^T\bm{\beta}\right)^T\left(\bm{y}-\bm{X}^T\bm{\beta}\right)\right\}.
+C(\bm{\beta})=\frac{1}{n}\left\{\left(\bm{y}-\bm{X}\bm{\beta}\right)^T\left(\bm{y}-\bm{X}\bm{\beta}\right)\right\}.
 \]
 !et
 This function is one possible way to define the so-called cost function.
@@ -354,7 +354,7 @@ This function is one possible way to define the so-called cost function.
 
 
 It is also common to define
-the function $Q$ as
+the function $C$ as
 
 !bt
 \[