1,721,143 research outputs found
Intelligenze multiple e insegnamento della matematica nella scuola primaria: dai punti di forza del bambino ai settori di debolezza
No full textMoebius Transformations and the Poincarè distance in the quaternionic setting.
No full textIn the space of quaternions, we investigate the natural, invariant geometry of the open, unit disc and of the open half-space These two domains are diffeomorphic via a Cayley-type transformation. We first study the geometrical structure of the groups of M\"obius transformations of and and identify original ways of representing them in terms of two isomorphic groups of matrices with quaternionic entries. We then define the cross-ratio of four quaternions, prove that, when real, it is invariant under the action
of the M\"obius transformations, and use it to define the analog of the Poincare' distances and differential metrics on and $\mathbb{H}^+.
Schr¿der equation in several variables and composition operators.
No full textLet be a holomorphic self-map of the open unit ball of such that and that the differential of at 0 is non singular. The study of the Schroder equation in several complex variables is naturally related to the theory of composition operators on Hardy spaces of holomorphic maps on and to the theory of the discrete, complex dynamical systems. An extensive use of the infinite matrix which represents the composition operator associated to the map leads to a simpler approach, and provides new proofs, to results of existence of solutions for the Schroder equation
Il mito e la Bibbia: due volti della rivoluzione dell’immaginario iconografico nella tarda antichità
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La camera aerofotogrammetria digitale Leica ADS40: i nuovi orizzonti nelle applicazioni delle riprese aeree digitali per la rappresentazione del territorio
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