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    On a flawed argument against the KK principle

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    It is often claimed that externalist analyses of knowledge imply the falsity of the KK principle. However one of the standard arguments for this claim in the literature rests on a straightforward intensional fallacy. The fallacy is exposed and discussed

    KK-DUALITY FOR SELF-SIMILAR GROUPOID ACTIONS ON GRAPHS

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    We extend Nekrashevych’s KK-duality for C∗-algebras of regular, recurrent, contracting self-similar group actions to regular, contracting self-similar groupoid actions on a graph, removing the recurrence condition entirely and generalising from a finite alphabet to a finite graph. More precisely, given a regular and contracting self-similar groupoid (G, E) acting faithfully on a finite directed graph E, we associate two C∗-algebras, O(G, E) and Ô(G, E), to it and prove that they are strongly Morita equivalent to the stable and unstable Ruelle C*-algebras of a Smale space arising from a Wieler solenoid of the self-similar limit space. That these algebras are Spanier-Whitehead dual in KK-theory follows from the general result for Ruelle algebras of irreducible Smale spaces proved by Kaminker, Putnam, and the last author

    K-theory for group C*-algebras

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    These notes are based on a lecture course given by the first author in the Sedano Winter School on K-theory held in Sedano, Spain, on January 22-27th of 2007. They aim at introducing K-theory of C*-algebras, equivariant K-homology and KK-theory in the context of the Baum-Connes conjectur

    [[alternative]]Shape and KK Masses

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    [[abstract]]我們討論在六維時空模型中,額外維度空間的形狀對現象學的影響。兩個以週期性條件緊緻化的維度可以夾角Θ,此角對Kaluza-Klein態的質量有很大影響。我們特別考慮Θ<<1的情況,大部分的KK態質量會比Θ=90°時大很多,但是有一群KK態的質量會相較下小很多,我們討論這些Light KK態的KK數n1、n2滿足哪些條件,並以一個具體Θ為例找出最輕的一些KK態,這些態通常具有蠻大的KK數。如果在Universal Extra Dimension模型中來討論,KK數守恆會造成許多Light KK態無法衰變,而形成穩定粒子,這些粒子可能成為黑物質。

    Najvažniji rezultati projekta KK.01.1.1.04.0091 (BIOKOMPOZITI) Dizajn naprednih kompozita iz energetski održivih izvora

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    Navedeni su najvažniji rezultati projekta KK.01.1.1.04.0091 (BIOKOMPOZITI) Dizajn naprednih kompozita iz energetski održivih izvora: dizajnirani i izrađeni su prototipovi naprednih biokompozita, nabavljena znanstveno-istraživačka oprema, 4 patenta i sveučilišni priručnik "Održivi razvoj Biokompozita i biogoriva iz obnovljivih izvora energije"

    KK, Knowledge, Knowability

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    kk states that knowing entails knowing that one knows, and K¬K states that not knowing entails knowing that one does not know. In light of the arguments against kk and K¬K⁠, one might consider modally qualified variants of those principles. According to weak kk, knowing entails the possibility of knowing that one knows. And according to weakK¬K⁠, not knowing entails the possibility of knowing that one does not know. This paper shows that weak kk and weakK¬K are much stronger than they initially appear. Jointly, they entail kk and K¬K⁠. And they are susceptible to variants of the standard arguments against kk and K¬K⁠. This has interesting implications for the debate on positive introspection and for deeper issues concerning the structure and limits of knowability

    KK, Knowledge, Knowability

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    kk states that knowing entails knowing that one knows, and K¬K states that not knowing entails knowing that one does not know. In light of the arguments against kk and K¬K⁠, one might consider modally qualified variants of those principles. According to weak kk, knowing entails the possibility of knowing that one knows. And according to weakK¬K⁠, not knowing entails the possibility of knowing that one does not know. This paper shows that weak kk and weakK¬K are much stronger than they initially appear. Jointly, they entail kk and K¬K⁠. And they are susceptible to variants of the standard arguments against kk and K¬K⁠. This has interesting implications for the debate on positive introspection and for deeper issues concerning the structure and limits of knowability

    KK Yulizawati

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    KK Yulizawat
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