Marked Groups with Isomorphic Cayley Graphs but Different Borel Combinatorics
classification
🧮 math.LO
keywords
graphsdifferentborelcayleychromaticgroupsisomorphicmarked
read the original abstract
We construct pairs of marked groups with isomorphic Cayley graphs but different Borel chromatic numbers for the free parts of their shift graphs. This answers a question of Kechris and Marks. We also show that these graphs have different Baire measurable and measure chromatic numbers, answering analogous versions of the question.
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