Matches in DBpedia 2015-10 for { ?s ?p "In mathematics, in the theory of Hopf algebras, a Hopf algebroid is a generalisation of weak Hopf algebras and certain skew Hopf algebras: the concept was introduced by J.-H. Lu in 1996 as a result on work on groupoids in Poisson geometry (later shown equivalent in nontrivial way to a construction of Takeuchi from the 1970s and another by Xu around the year 2000)."@en }
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- Hopf_algebroid comment "In mathematics, in the theory of Hopf algebras, a Hopf algebroid is a generalisation of weak Hopf algebras and certain skew Hopf algebras: the concept was introduced by J.-H. Lu in 1996 as a result on work on groupoids in Poisson geometry (later shown equivalent in nontrivial way to a construction of Takeuchi from the 1970s and another by Xu around the year 2000).".