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math.AC2010
On modules over Laurent polynomial rings
Daniel S. Silver, Susan G. Williams
A finitely generated module over the ring L=Z[t, t^{-1}] of integer Laurent polynomials that has no Z-torsion is determined by a pair of sub-lattices of L^d. Their indices are the…
math.GT2010
Twisting Alexander Invariants with Periodic Representations
Daniel S. Silver, Susan G. Williams
Twisted Alexander invariants have been defined for any knot and linear representation of its group. The invariants are generalized for any periodic representation of the commutator…