Erdös Number

My Erdös number is at most 3. Here is one route connecting me to Erdös:

Erdös, P. and E. P. Specker. On a theorem in the theory of relations and a solution of a problem of Knaster. Colloquium Mathematicae, 8:19–21, 1961.

Gaifman, H. and E. P. Specker. Isomorphism types of trees. Proceedings of the American Mathematical Society, 15(1):1–7, 1964.

Gaifman, H. and Y. Liu. A Simpler and More Realistic Subjective Decision Theory. Synthese, 195(10):4205– 4241, 2018.