Geodesic
Quandle Cocycle Invariants for Spatial Graphs and Knotted Handlebodies
Canadian journal of mathematics, Tome 64 (2012) no. 1, pp. 102-122

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DOI

We introduce a flow of a spatial graph and see how invariants for spatial graphs and handlebody-links are derived from those for flowed spatial graphs. We define a new quandle (co)homology by introducing a subcomplex of the rack chain complex. Then we define quandle colorings and quandle cocycle invariants for spatial graphs and handlebody-links.
DOI : 10.4153/CJM-2011-035-0
Mots-clés : 57M27, 57M15, 57M25, quandle cocycle invariant, knotted handlebody, spatial graph 
Ishii, Atsushi; Iwakiri, Masahide. Quandle Cocycle Invariants for Spatial Graphs and Knotted Handlebodies. Canadian journal of mathematics, Tome 64 (2012) no. 1, pp. 102-122. doi: 10.4153/CJM-2011-035-0
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     title = {Quandle {Cocycle} {Invariants} for {Spatial} {Graphs} and {Knotted} {Handlebodies}},
     journal = {Canadian journal of mathematics},
     pages = {102--122},
     year = {2012},
     volume = {64},
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     doi = {10.4153/CJM-2011-035-0},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2011-035-0/}
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