Update thin_plate_spline_interpolation.md

Author: djeada

notes/6_regression/thin_plate_spline_interpolation.md

@@ -197,15 +197,14 @@ $$
 Explicitly,
 
 $$
-A = 
-\begin{bmatrix}
-  0        & 0        & 0        & 0.693147 & 1 & 0 & 0 \\ 
-  0        & 0        & 0.693147 & 0        & 1 & 1 & 0 \\ 
-  0        & 0.693147 & 0        & 0        & 1 & 0 & 1 \\ 
-  0.693147 & 0        & 0        & 0        & 1 & 1 & 1 \\ 
-  1 & 1 & 1 & 1 & 0 & 0 & 0 \\ 
-  0 & 1 & 0 & 1 & 0 & 0 & 0 \\ 
-  0 & 0 & 1 & 1 & 0 & 0 & 0 
+A = \begin{bmatrix}
+0        & 0        & 0        & \ln 2 & 1 & 0 & 0 \\ 
+0        & 0        & \ln 2   & 0      & 1 & 1 & 0 \\ 
+0        & \ln 2   & 0        & 0      & 1 & 0 & 1 \\ 
+\ln 2   & 0        & 0        & 0      & 1 & 1 & 1 \\ 
+1        & 1        & 1        & 1      & 0 & 0 & 0 \\ 
+0        & 1        & 0        & 1      & 0 & 0 & 0 \\ 
+0        & 0        & 1        & 1      & 0 & 0 & 0
 \end{bmatrix}
 $$