Abstract
The survey covers several topics related to the asymptotic structure of various combinatorial and analytic objects such as the path spaces in graded graphs (Bratteli diagrams), invariant measures with respect to countable groups, etc. The main subject is the asymptotic structure of filtrations and a new notion of standardness. All graded graphs and all filtrations of Borel or measure spaces can be divided into two classes: the standard ones, which have a regular behavior at infinity, and the other ones. Depending on this property, the list of invariant measures can either be well parameterized or have no good parametrization at all. One of the main results is a general standardness criterion for filtrations. We consider some old and new examples which illustrate the usefulness of this point of view and the breadth of its applications.
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Communicated by: Toshiyuki Kobayashi
This article is based on the 15th Takagi Lectures that the author delivered at Tohoku University on June 27 and 28, 2015
Supported by the Russian Science Foundation grant 14-11-00581.
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Vershik, A.M. Asymptotic theory of path spaces of graded graphs and its applications. Jpn. J. Math. 11, 151–218 (2016). https://doi.org/10.1007/s11537-016-1527-z
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DOI: https://doi.org/10.1007/s11537-016-1527-z
Keywords and phrases
- graded graph
- Markov compactum
- cotransition probability
- central measure
- filtration
- standardness
- limit shape