## Vapnik-Chervonenkis density on indiscernible sequences, stability, and the maximum property.(English)Zbl 1372.03064

Summary: This paper presents some finite combinatorics of set systems with applications to model theory, particularly the study of dependent theories. There are two main results. First, we give a way of producing lower bounds on $$\mathrm{VC}_{\mathrm{ind}}$$-density and use it to compute the exact $$\mathrm{VC}_{\mathrm{ind}}$$-density of polynomial inequalities and a variety of geometric set families. The main technical tool used is the notion of a maximum set system, which we juxtapose to indiscernibles. In the second part of the paper we give a maximum set system analogue to Shelah’s characterization of stability using indiscernible sequences.

### MSC:

 03C45 Classification theory, stability, and related concepts in model theory 05D05 Extremal set theory

### Keywords:

VC-density; VC-dimension; NIP; stability
Full Text:

### References:

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