Differentiable functions of Cayley-Dickson numbers

Details Differentiable functions of Cayley-Dickson numbers Differentiable functions of Cayley-Dickson numbers

2004-05-24

arxiv.org/abs/math/0405471v2

J. Mathem. Sci. 2007

Mathematics

Complex Variables

63 pages, few comments are added in the text; in accordance with the desire of the second author his name was moved to the end

Scientific paper

We investigate superdifferentiability of functions defined on regions of the real octonion (Cayley) algebra and obtain a noncommutative version of the Cauchy-Riemann conditions. Then we study the noncommutative analog of the Cauchy integral as well as criteria for functions of an octonion variable to be analytic. In particular, the octonion exponential and logarithmic functions are being investigated. Moreover, superdifferentiable functions of variables belonging to Cayley-Dickson algebras (containing the octonion algebra as the proper subalgebra) finite and infinite dimensional are investigated. Among main results there are the Cayley-Dickson algebras analogs of Cauchy's theorem, Hurwitz', argument principle, Mittag-Leffler's, Rouche's and Weierstrass' theorems.

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