The Corona Theorem as an Operator Theorem
C. F. Schubert · Proceedings of the American Mathematical Society · 1978
We provide a short proof of a theorem of W. B. Arveson in operator theory. The conclusion of this theorem is the same as that of the Corona Theorem but the hypotheses are operator theoretic. Our proof yields an exact value for the constant involved. We also comment on this theorem as a new approximation problem.