Functional -> operator

Author: jagot

README.md

@@ -42,7 +42,7 @@ function test_basis(B)
     # This is the continuous axis
     x = axes(B,1)
 
-    # This corresponds to a functional L whose action on a function
+    # This corresponds to a operator L whose action on a function
     # f(x) is defined as Lf(x) = sin(2πx)*f(x). In physics this is a
     # potential.
     @info "Sine operator"

docs/src/bsplines/theory.md

@@ -270,7 +270,7 @@ $$\begin{equation}
 \operator{L}f = g,
 \end{equation}$$
 
-where $\operator{L}$ is a linear functional, we can solve the equation
+where $\operator{L}$ is a linear operator, we can solve the equation
 approximately by expanding $f$ and $g$ in terms of B-splines:
 
 $$\begin{equation}
@@ -294,7 +294,7 @@ $$\begin{equation}
 
 The right-hand side is trivially in the space $\space{P}_{t,k}$,
 whereas is not necessary true for the left-hand side, i.e. the
-functional $\operator{L}$ may take $f$ out of the space. We can
+operator $\operator{L}$ may take $f$ out of the space. We can
 project the equation into the space $\space{P}_{t,k}$ by
 left-multiplying by the projector $BB^H$: