"Algebraic topology." . . "Algebraic Topology" . "H-spaces." . . "Polinomios." . . "Polynomes." . . "Hopf, Álgebras de." . . . . . . . . . . "Electronic books"@en . . . . . . . . . . . . . . . . . "Twisted polynomial hyperalgebras"@en . "Twisted polynomial hyperalgebras" . . . . . . . . . . . . . . . . . . . . . . . . . "Twisted Polynomial Hyperalgebras"@it . "Twisted Polynomial Hyperalgebras"@en . "Twisted Polynomial Hyperalgebras" . . . . . . "H-espaces." . . "Homology theory." . . "Topology." . . "Algebra." . . "Algebra Associativa." . . "American Mathematical Society." . . "Topologie." . . "Àlgebres associatives" . . "Algebra conmutativa." . . "Hyperalgebra." . . "Hyperfunctions." . . . . "Hyperalgebras." . .