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PhD and MPhil Thesis Classes
PhD and MPhil Thesis Classes

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... Ron Howard was born in 1954. You can find out what year Ron turned 16 by adding the year he was born to his age. ...
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... fundamental class of K0,3 X (Σ), 0 . We are then able to verify that multiplication in the deformed group ring coincides with the product in the orbifold Chow ring. The paper is organized as follows. In Section 2, we extend Gale duality to maps of finitely generated abelian groups. This duality forms ...
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THE PICARD GROUP OF EQUIVARIANT STABLE HOMOTOPY

... For a compact Lie group G, the isomorphism classes of invertible G-spectra form a group, Pic(HoGS ), under the smash product. Here HoGS is the stable homotopy category of G-spectra indexed on a complete G-universe, as defined in [21]. We shall prove the following theorem. Theorem 0.1. There is an ex ...
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Relations – Chapter 11 of Hammack

... Proof. First, note that each equivalence class is nonempty, since a ∈ [a] and so each element of A belongs to at least one equivalence class. We must show that every element of A belongs to exactly one equivalence class. Assume that some element x ∈ A belongs to two equivalence classes, say [a] and ...
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On the Universal Space for Group Actions with Compact Isotropy

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... with a neutral element 1 ∈ M for this product. In this case, it can be proved that the group of invertible elements of M , G(M ) = {g ∈ M | ∃ g −1 } is an affine algebraic group, that is open in M and usually called the unit group of M . We will concentrate our attention in reductive monoids whose g ...
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... [] Let 1 ~ g E G and let Cg : G --~ H be an A-homomorphism consistent with # and such that ~g(g) ~ 1. There exists a homomorphism r : G B ---* H such that ~g = CA. Therefore, A(g) ~ 1. [] w 3. T h e C a t e g o r y of G r o u p s w i t h E x p o n e n t s We list basic categorical properties of tens ...
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Full Text (PDF format)

... → H 1 (GF , Fl ). The Milnor K-theory M ring K (F ) is a skew-commutative quadratic algebra over Z generated by K1M (F ) = F ∗ with the Steinberg relations {a, 1 − a} = 0. It is not difficult to show that the Kummer map can be extended to an algebra homomorphism K M (F ) ⊗ Fl −−→ H ∗ (GF , Fl ), which ...
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Motive (algebraic geometry)

In algebraic geometry, a motive (or sometimes motif, following French usage) denotes 'some essential part of an algebraic variety'. To date, pure motives have been defined, while conjectural mixed motives have not. Pure motives are triples (X, p, m), where X is a smooth projective variety, p : X ⊢ X is an idempotent correspondence, and m an integer. A morphism from (X, p, m) to (Y, q, n) is given by a correspondence of degree n – m.As far as mixed motives, following Alexander Grothendieck, mathematicians are working to find a suitable definition which will then provide a ""universal"" cohomology theory. In terms of category theory, it was intended to have a definition via splitting idempotents in a category of algebraic correspondences. The way ahead for that definition has been blocked for some decades by the failure to prove the standard conjectures on algebraic cycles. This prevents the category from having 'enough' morphisms, as can currently be shown. While the category of motives was supposed to be the universal Weil cohomology much discussed in the years 1960-1970, that hope for it remains unfulfilled. On the other hand, by a quite different route, motivic cohomology now has a technically adequate definition.
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