Of course Riemann, Schwarz, Carl Neumann, and Poincaré had all solved problems which now came under Fredholm's general case of an integral equation; this was an indication of how powerful his theory was.
Ng mga kurso Riemann, Schwarz, Carl Neumann, at Poincaré had malulutas ang lahat ng problema na ngayon ang dumating sa ilalim ng Fredholm ng pangkalahatang kaso ng isang equation na mahalaga; na ito ay isang indikasyon ng malakas na kung paano ang kanyang teorya ay.