I always liked this viewpoint a lot. I'm enjoying with abandon some dusty lectures that Vito Volterra gave in Madrid on differential and integrodifferential equ

I always liked this viewpoint a lot. I'm enjoying with abandon some dusty lectures that Vito Volterra gave in Madrid on differential and integrodifferential equations, while helping also to create Functional Analysis (a Functional being the analogue of a dual vector). He is constantly exploiting this analogy method from finite variable constructions to infinite, also uncountable variables. Even up to showing some embarrassment of being too repetitive with the idea! People in teaching should join and take a peek. https://searchworks.stanford.edu/view/526111 https://searchworks.stanford.edu/view/526111