On définit l’algèbre de Hecke singulière comme le quotient de l’algèbre de monoïde par les relations de Hecke , . On définit la notion de trace de Markov dans ce cadre, en fixant le nombre de points singuliers, et on démontre qu’une trace de Markov détermine un invariant sur les entrelacs à points singuliers qui vérifie une relation d’écheveau. Soit l’ensemble des traces de Markov à points singuliers fixés. C’est un espace vectoriel sur . Notre résultat principal est que est de dimension . Ce résultat est complété par une construction explicite d’une base de . Grâce à ces résultats, nous définissons une trace de Markov universelle et un invariant universel de type HOMFLY sur les entrelacs singuliers. Cet invariant est l’unique invariant qui vérifie une certaine relation d’écheveau et une certaine relation de désingularisation.
We define the singular Hecke algebra as the quotient of the singular braid monoid algebra by the Hecke relations , . We define the notion of Markov trace in this context, fixing the number of singular points, and we prove that a Markov trace determines an invariant on the links with singular points which satisfies some skein relation. Let denote the set of Markov traces with singular points. This is a -vector space. Our main result is that is of dimension . This result is completed with an explicit construction of a basis of . Thanks to this result, we define a universal Markov trace and a universal HOMFLY-type invariant on singular links. This invariant is the unique invariant which satisfies some skein relation and some desingularization relation.
Keywords: Singular Hecke algebra, singular link, singular knot, singular braid, Markov trace
Mot clés : Algèbre de Hecke singulière, entrelacs singulier, noeud singulier, trace de Markov
Paris, Luis 1 ; Rabenda, Loïc 1
@article{AIF_2008__58_7_2413_0, author = {Paris, Luis and Rabenda, Lo{\"\i}c}, title = {Singular {Hecke} algebras, {Markov} traces, and {HOMFLY-type} invariants}, journal = {Annales de l'Institut Fourier}, pages = {2413--2443}, publisher = {Association des Annales de l{\textquoteright}institut Fourier}, volume = {58}, number = {7}, year = {2008}, doi = {10.5802/aif.2419}, mrnumber = {2498356}, zbl = {1171.57008}, language = {en}, url = {https://aif.centre-mersenne.org/articles/10.5802/aif.2419/} }
TY - JOUR AU - Paris, Luis AU - Rabenda, Loïc TI - Singular Hecke algebras, Markov traces, and HOMFLY-type invariants JO - Annales de l'Institut Fourier PY - 2008 SP - 2413 EP - 2443 VL - 58 IS - 7 PB - Association des Annales de l’institut Fourier UR - https://aif.centre-mersenne.org/articles/10.5802/aif.2419/ DO - 10.5802/aif.2419 LA - en ID - AIF_2008__58_7_2413_0 ER -
%0 Journal Article %A Paris, Luis %A Rabenda, Loïc %T Singular Hecke algebras, Markov traces, and HOMFLY-type invariants %J Annales de l'Institut Fourier %D 2008 %P 2413-2443 %V 58 %N 7 %I Association des Annales de l’institut Fourier %U https://aif.centre-mersenne.org/articles/10.5802/aif.2419/ %R 10.5802/aif.2419 %G en %F AIF_2008__58_7_2413_0
Paris, Luis; Rabenda, Loïc. Singular Hecke algebras, Markov traces, and HOMFLY-type invariants. Annales de l'Institut Fourier, Tome 58 (2008) no. 7, pp. 2413-2443. doi : 10.5802/aif.2419. https://aif.centre-mersenne.org/articles/10.5802/aif.2419/
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