Bochner found that the Riemann Localisation Theorem was not valid for Fourier series of several variables (1935-1936), which led him indirectly to consider functions of several complex variables (1937).
Bochner constató que el teorema de localización de Riemann no era válida para la serie de Fourier de diversas variables (1935 - 1936), que le llevó indirectamente a considerar las funciones de varias variables complejas (1937).