Free $\Sigma$-structures
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- by G. Grätzer PDF
- Trans. Amer. Math. Soc. 135 (1969), 517-542 Request permission
References
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G. Birkhoff, On the structure of abstract algebras, Proc. Cambridge Philos. Soc. 31 (1935), 433-454.
- Samuel Eilenberg and Norman Steenrod, Foundations of algebraic topology, Princeton University Press, Princeton, N.J., 1952. MR 0050886, DOI 10.1515/9781400877492
- T. Frayne, A. C. Morel, and D. S. Scott, Reduced direct products, Fund. Math. 51 (1962/63), 195–228. MR 142459, DOI 10.4064/fm-51-3-195-228
- G. Grätzer, Free algebras over first order axiom systems, Magyar Tud. Akad. Mat. Kutató Int. Közl. 8 (1963), 193–199 (English, with Russian summary). MR 167443
- Philip J. Higgins, Algebras with a scheme of operators, Math. Nachr. 27 (1963), 115–132. MR 163940, DOI 10.1002/mana.19630270108
Additional Information
- © Copyright 1969 American Mathematical Society
- Journal: Trans. Amer. Math. Soc. 135 (1969), 517-542
- MSC: Primary 08.10
- DOI: https://doi.org/10.1090/S0002-9947-1969-0232724-0
- MathSciNet review: 0232724