In what follows we keep the basic notation and conventions of Chapter 1. In particular, by a ring we always mean an associative ring with unity, every ring homomorphism is unitary (maps unity onto unity), every subring of a ring contains the unity of the ring. Unless otherwise indicated, by the module over a ring A we mean a left A-module. Every module over a ring is unitary and every algebra over a commutative ring is also unitary.
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© 2008 Springer Science + Business Media B.V.
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(2008). Basic Concepts of Difference Algebra. In: Difference Algebra. Algebra and Applications, vol 8. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6947-5_2
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DOI: https://doi.org/10.1007/978-1-4020-6947-5_2
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