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The Maximal Co-Rational Extension by a Module

Published online by Cambridge University Press:  20 November 2018

R. C. Courter
R. C. Courter*
Affiliation:
University of Windsor, Windsor, Ontario
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Modules are S-modules where S is an arbitrary ring with or without a unit element. We consider a projective module P having a submodule K such that K + Y = P implies that the submodule Y is P (P, then, is a projective cover of P/K (Definition 4 in this section)) and we define the submodule X of P by

Our main result states that up to isomorphism P/X is the maximal co-rational extension over P/K (by P/K, in the more precise wording of the title).

Type
Research Article
Information
Canadian Journal of Mathematics , Volume 18 , 1966 , pp. 953 - 962
Copyright
Copyright © Canadian Mathematical Society 1966

References

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