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math.NT2019
The Ulam Sequence of the Integer Polynomial Ring
Arseniy Sheydvasser
An Ulam sequence U(1,n) is defined as the sequence starting with integers 1,n such that n > 1, and such that every subsequent term is the smallest integer that can be written as th…
math.NT2019★ 1 cited
Algebraic Groups Constructed from Orders of Quaternion Algebras
Arseniy Sheydvasser
We show that all spin groups of non-definite, quinary quadratic forms over a field with characteristic 0 can be represented as 2 by 2 matrices with entries in an associated quatern…