1,721,183 research outputs found

    Superstring field theory, superforms and supergeometry

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    Inspired by superstring field theory, we study differential, integral, and inverse formsand their mutual relations on a supermanifold from a sheaf-theoretical point of view.In particular, the formal distributional properties of integral forms are recovered inthis scenario in a geometrical way. Further, we show how inverse forms ‘‘extend’’the ordinary de Rham complex on a supermanifold, thus providing a mathematicalfoundation of the Large Hilbert Space used in superstrings. Last, we briefly discuss howtheHodgediamondofasupermanifoldlookslike,andweexplicitlycomputeitforsuperRiemann surfaces

    A∞ -Algebra from Supermanifolds

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    Inspired by the analogy between different types of differentialforms on supermanifolds and string fields in superstring theory, we con-struct new multilinear non-associative products of forms which yield, fora single fermionic dimension, anA∞-algebra as in string field theory.For multiple fermionic directions, we give the rules for constructing non-associative products, which are the basis for a fullA∞-algebra structureto be yet discussed

    L’angosciosa resistenza: decostruire la categoria dell’“abbandono istituzionale” nel quartiere di edilizia popolare di San Siro (Milano)

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    A partire dall’analisi situazionale di un evento che ha interessato il quartiere popolare di San Siro (Milano) – un’attività d’animazione organizzata da un comitato di cittadini, tramutatasi in agorà, quindi una vera e propria assemblea cittadina, grazie alla partecipazione di membri del consiglio comunale, soggetti del terzo settore e attivisti del movimento per il diritto alla casa – l’articolo approfondirà etnograficamente la categoria dell’“abbandono istituzionale”, ossia la condizione di desolazione e di degrado che interesserebbe quello spazio urbano. Tale categoria, utilizzata in maniera indiscriminata da attori sociali disparati, compresi urbanisti e scienziati sociali, se accostata all’insieme d’interventi pubblici implementati nel quartiere negli ultimi dieci anni, mostra uno scarto palese tra la sua ricorrenza e la realtà fattuale. L’articolo analizzerà questo scarto, il potenziale interpretativo che esso contiene e la sua funzione nel quadro delle più ampie politiche urbane milanesi.Starting from the situational analysis of an event that took place in the public housing neighbourhood of San Siro (Milan) – a social activity organized by a neighbourhood committee that turned into an agora, an assembly, thanks to the participation of the city council members, third sector organizations, and social movements activists – the paper will ethnographically investigate the category of “institutional abandonment”, i.e. the condition of desolation and decay that would affect that urban space. This category, used in an indiscriminate manner by disparate social actors – including urban planners and social scientists – shows a gap between its frequency and the factual reality when it is associated to all the public interventions implemented in the neighbourhood in the last ten years. Thus, the paper will analyse this gap, its interpretative potential, and its function within the broader urban politics of Milan
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