### Saunders Mac Lane, 1909–2005: ~~Meeting a grand leader~~

#### Works connected to ~~Samuel Eilenberg~~

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Group extensions and homology,” Ann. Math. (2) 43 : 4 (October 1942), pp. 757–831. MR 0007108 Zbl 0061.40602 article

: “Natural isomorphisms in group theory,”
Proc. Natl. Acad. Sci. U.S.A.
28 : 12
(December 1942),
pp. 537–543.
See also article in *Gaz. Mat.* **29**:109–112 (1968).
MR
0007421
Zbl
0061.09203
article

General theory of natural equivalences,” Trans. Am. Math. Soc. 58 : 2 (September 1945), pp. 231–294. MR 0013131 Zbl 0061.09204 article

: “Selected papers. Edited by I. Kaplansky. Springer (New York), 1979. With contributions by Alfred Putnam, Roger Lyndon, Kaplansky, Samuel Eilenberg and Max Kelly. MR 544841 Zbl 0459.01024 book

:Samuel Eilenberg and categories,” pp. 127–131 in Category theory 1999 (Coimbra, Portugal, 13–17 July 1999), published as J. Pure Appl. Algebra 168 : 2–3. Issue edited by J. Adamek, P. T. Johnstone, and M. Sobral. 2002. MR 1887153 Zbl 0992.18001 incollection

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