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arXiv · 1207.2250

A Length Function for Weyl Groups of extended affine root systems of Type $A_1$

Saeid Azam·Mohammad Nikouei
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Abstract

In this work, we study the concept of the length function and some of its combinatorial properties for the class of extended affine root systems of type $A_1$. We introduce a notion of root basis for these root systems, and using a unique expression of the elements of the Weyl group with respect to a set of generators for the Weyl group, we calculate the length function with respect to a very specific root basis.

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Saeid Azam, Mohammad Nikouei. 2012-07-10. A Length Function for Weyl Groups of extended affine root systems of Type $A_1$. https://arxiv.org/abs/1207.2250

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