Theorem: My Erdös number is three.

Proof: (We only prove smaller than or equal to three - the proof of strictly greater than two can be found here)

Erdös, Paul; Shapiro, Harold S.; Shields, A.L.
Large and small subspaces of Hilbert space, Mich. Math. J. 12, 169-178 (1965).

Blondel, Vincent D.; Rupp, Rudolf; Shapiro, Harold S.
On zero and one points of analytic functions, Complex Variables, Theory Appl. 28, No.2, 189-192 (1995).

Stoustrup, Jakob; Blondel, Vincent D.
Fault Tolerant Control: A Simultaneous Stabilization Result, IEEE Transactions on Automatic Control, Vol. 49, No. 2, 305-310 (2004).