Ruess, W. M.
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Aron, R. Lindström, M.; Ruess, W. M.; Ryan, R. (1999). . Proceedings of the American Mathematical Society 127 (4), 1119-1125
We prove a factorization result for relatively compact subsets of compact operators using the Bartle and Graves Selection Theorem, a characterization of relatively compact subsets of tensor products due to Grothendieck, and results of Figiel and Johnson on factorization of compact operators. A further proof, essentially based on the Banach-Dieudonne Theorem, is included. Our methods enable us to give an easier proof of a result of W.H. Graves and W.M. Ruess.