Reply to D Xie and Z Sheng

Reply from d. Graur.

Perhaps the most unscientific Each of us should keep in mind though it is he whomay discover statement in Graur’s review is the the words of Murray L. Johnsonz4, a exciting new data’. proposal that gundis Ktenodactylpioneering mammalogist interested idae) have no known extinct recent in biochemical systematics: ‘the best Franqois M. Catzeflis relatives a pessimistic remark judgement will be mad...

2-D Laplace-Z Transformation

Based on recent results for 2-D continuous-discrete systems, this paper develops 2-D Laplace-z transform, which can be used to analyze 2-D continuous-discrete signals and system in Laplace-z hybrid domain. Current 1-D Laplace transformation and z transform can be combined into the new 2-D s-z transform. However, 2-D s-z transformation is not a simple extension of 1D transform, in 2-D case, we n...

Author's reply: Z-Score: Fenton 2013. Ten-year update.

Expansion in SL d ( Z / q Z ) , q arbitrary

Let S be a fixed finite symmetric subset of SLd(Z), and assume that it generates a Zariski-dense subgroup G. We show that the Cayley graphs of πq(G) with respect to the generating set πq(S) form a family of expanders, where πq is the projection map Z → Z/qZ.

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