Browsing Institutt for matematiske fag by Author "Patra, Frédéric"
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Shifted Substitution in Non-Commutative Multivariate Power Series with a View Toward Free Probability
Ebrahimi-Fard, Kurusch; Patra, Frédéric; Zambotti, Lorenzo; Tapia, Nikolas (Peer reviewed; Journal article, 2023)We study a particular group law on formal power series in non-commuting variables induced by their interpretation as linear forms on a suitable graded connected word Hopf algebra. This group law is left-linear and is ...