Volume 20, Issue 6, December 2012

ISSN: 0927-2852 (Print) 1572-9095 (Online)

In this issue (4 articles)

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    Algebraic Exponentiation in General Categories

    James Richard Andrew Gray Pages 543-567
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    De Vries Algebras and Compact Regular Frames

    Guram Bezhanishvili Pages 569-582
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    Natural Dualities in Partnership

    Brian A. Davey, Miroslav Haviar, Hilary A. Priestley Pages 583-602
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    The Groupoidal Analogue $\widetilde{{\Theta}}$ to Joyal’s Category Θ is a Test Category

    Dimitri Ara Pages 603-649
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