[Analysis] Final tweaks

semester3/analysis-ii/cheat-sheet-jh/parts/vectors/differentiation/06_critical_points.tex

@@ -67,3 +67,5 @@ where the lowest value is the global minimum and the highest value the global ma
 Always consider the corners as possible maxima or minima (if some corners are critical points, all are highly likely to be).
 
 The tangent plane at a critical point of a function $f : \R^n \rightarrow \R$, is of the form $\{ (x, y, z) \divides z = \text{const} \}$, with $z = f(x_0)$.
+
+Note that a global minimum or maximum is the maximal / minimal element of the range of the function.