FUNDAMENTALNAYA I PRIKLADNAYA MATEMATIKA

(FUNDAMENTAL AND APPLIED MATHEMATICS)

2013, VOLUME 18, NUMBER 4, PAGES 89-105

Invariants of homotopy classes of curves and graphs on 2-surfaces

V. O. Manturov
D. A. Fedoseev

Abstract

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Algebraic objects arising from the study of curves and graphs on 2-surfaces are studied. Their homotopy invariance is verified.

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