Train Tracker
3
ခရီး နှင့် ဒေသဆိုင်ရာ | 4.0MB
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In the mathematical subject of geometric group theory, a TRAIN TRACKER map is a continuous map function from a finite connected graph to itself which is a homotopy equivalence and which has particularly nice cancellation properties with respect to iterations. This map sends vertices to vertices and edges to nontrivial edge-paths with the property that for every edge e of the graph and for every positive integer n the path fn(e) is immersed, that is fn(e) is locally injective on e. Train-track maps are a key tool in analyzing the dynamics of automorphisms of finitely generated free groups and in the study of the Culler–Vogtmann Outer space.
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သတင်းအချက်အလက်
အပ်ဒိတ်လုပ်ပြီး: 2018-06-15
လက်ရှိဗားရှင်း: 1.0.4
Android လိုအပ်သည်: Android 4.0 or later