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math.NT2003
On the involutions fixing the class of a lattice
Heinz-Georg Quebbemann, Eric M. Rains
With any integral lattice Λin n-dimensional euclidean space we associate an elementary abelian 2-group I(λ) whose elements represent parts of the dual lattice that are similar to Λ…
math.NT2002
The EKG Sequence
J. C. Lagarias, E. M. Rains, N. J. A. Sloane
The EKG or electrocardiogram sequence is defined by a(1) = 1, a(2) = 2 and, for n >= 3, a(n) is the smallest natural number not already in the sequence with the property that gcd {…