References
Freyd, P.: Abelian categories. New York: Harper and Row 1964.
Hilton, P.: Homotopy theory and duality. New York: Gordon and Breach 1965.
Kainen, P. C.: Universal coefficient theorems for generalized homology and stable cohomotopy. Pacific Math. J. (to appear).
Kainen, P. C.: Every commutative square of abelian groups can be realized by a homotopy commutative square of Moore, or co-Moore, spaces. J. London Math. Soc. (to appear).
Maranda, J. M.: Injective structures. Trans. Amer. Math. Soc.110, 98–135 (1964).
Mitchell, B.: Theory of categories. New York: Academic Press 1965.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Kainen, P.C. Weak adjoint functors. Math Z 122, 1–9 (1971). https://doi.org/10.1007/BF01113560
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF01113560