[1] Samuel Eilenberg and Saunders MacLane, General Theory of Natural Equivalences.
Trans. Amer. Math. Soc. 58 (1945), 231-294.
[2] Richard Arens, Operations induced in function classes.
Monatsh. für Math. 55 (1951), 1-19 (submitted April 1950).
Likely influences during IAS stay, 1945-1947,
after 1945 Harvard PhD:
S.-S. Chern |
C. Chevalley | Nelson Dunford |
S. Eilenberg |
Ralph
Fox | Paul Halmos | Ed Hewitt | J.L. Kelley |
S. Mac Lane | Robert
Schatten | Irving Segal | Leo Zippin |
and various other IAS colleagues (M. Morse, D. Montgomery,
H. Whitney, ...).