
arXiv: 1103.4644
The p -typical Witt vectors are a ubiquitous object in algebra and number theory. They arise as a functorial construction that takes perfect fields k of prime characteristic p > 0 to p -adically complete discrete valuation rings of characteristic 0 with residue field k and are universal in that sense. A. Dress and C. Siebeneicher generalized this construction by producing a functor \mathbf W_G attached to any profinite group G . The p -typical Witt vectors arise as those attached to the p -adic integers. Here we examine the ring structure of \mathbf W_G(k) for several examples of pro- p groups G and fields k of characteristic p . We will show that the structure is surprisingly more complicated than the p -typical case.
Mathematics - Number Theory, Witt-Burnside rings, Witt vectors and related rings, \(p\)-typical Witt vectors, FOS: Mathematics, Number Theory (math.NT), Mathematics - Commutative Algebra, Commutative Algebra (math.AC), big Witt vectors, Mathematics|Computer Science
Mathematics - Number Theory, Witt-Burnside rings, Witt vectors and related rings, \(p\)-typical Witt vectors, FOS: Mathematics, Number Theory (math.NT), Mathematics - Commutative Algebra, Commutative Algebra (math.AC), big Witt vectors, Mathematics|Computer Science
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