To any two graphs $G$ and $H$ one can associate a cell complex ${\tt Hom}(G,H)$ by taking all graph multihomomorphisms from $G$ to $H$ as cells.
Eric Babson  1 ; Dmitry N. Kozlov  2
@article{10_4007_annals_2007_165_965,
author = {Eric Babson and Dmitry N. Kozlov},
title = {Proof of the {Lov\'asz} conjecture},
journal = {Annals of mathematics},
pages = {965--1007},
year = {2007},
volume = {165},
number = {3},
doi = {10.4007/annals.2007.165.965},
mrnumber = {2335799},
zbl = {1132.05019},
language = {en},
url = {http://geodesic.mathdoc.fr/articles/10.4007/annals.2007.165.965/}
}
TY - JOUR AU - Eric Babson AU - Dmitry N. Kozlov TI - Proof of the Lovász conjecture JO - Annals of mathematics PY - 2007 SP - 965 EP - 1007 VL - 165 IS - 3 UR - http://geodesic.mathdoc.fr/articles/10.4007/annals.2007.165.965/ DO - 10.4007/annals.2007.165.965 LA - en ID - 10_4007_annals_2007_165_965 ER -
Eric Babson; Dmitry N. Kozlov. Proof of the Lovász conjecture. Annals of mathematics, Tome 165 (2007) no. 3, pp. 965-1007. doi: 10.4007/annals.2007.165.965
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