Semi algebraic Borel-Moore-homology

نویسندگان

چکیده

برای دانلود رایگان متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Oriented Cohomology, Borel-moore Homology and Algebraic Cobordism

We examine various versions of oriented cohomology and BorelMoore homology theories in algebraic geometry and put these two together in the setting of an “oriented duality theory”, a generalization of Bloch-Ogus twisted duality theory. We apply this to give a Borel-Moore homology version MGL ∗,∗ of Voevodsky’s MGL-theory, and a natural map θ : Ω∗ → MGL 2∗,∗ , where Ω∗ is the algebraic cobordism...

متن کامل

Borel-moore Homology, Riemann-roch Transformations, and Local Terms

1.1. For a finite type separated Deligne-Mumford stack X/k and integer i, the i-th `-adic Borel-Moore homology group of X, denoted Hi(X), is defined to be H (X,ΩX), where ΩX ∈ D c(X,Q`) is the `-adic dualizing complex of X. These groups were considered already by Laumon in [17] (and, we have been informed, by Grothendieck in unpublished work), where he showed they enjoyed a number of good prope...

متن کامل

Borel measures with a density on a compact semi-algebraic set

Let K ⊂ R be a compact basic semi-algebraic set. We provide a necessary and sufficient condition (with no à priori bounding parameter) for a real sequence y = (yα), α ∈ N, to have a finite representing Borel measure absolutely continuous w.r.t. the Lebesgue measure on K, and with a density in ∩p≥1Lp(K). With an additional condition involving a bounding parameter, the condition is necessary and ...

متن کامل

Semi-algebraic neighborhoods of closed semi-algebraic sets

— Given a closed (not necessarly compact) semi-algebraic set X in Rn, we construct a non-negative semi-algebraic C2 function f such that X=f−1(0) and such that for δ > 0 sufficiently small, the inclusion of X in f−1([0, δ]) is a retraction. As a corollary, we obtain several formulas for the Euler characteristic of X. Résumé. — Étant donné un ensemble semi-algébrique fermé (non nécessairement co...

متن کامل

Algebraic shifting increases relative homology

We show that algebraically shifting a pair of simplicial complexes weakly increases their relative homology Betti numbers in every dimension. More precisely, let ∆(K) denote the algebraically shifted complex of simplicial complex K, and let β j (K, L) = dim k H j (K, L; k) be the dimension of the jth reduced relative homology group over a field k of a pair of simplicial complexes L ⊆ K. Then β ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Rocky Mountain Journal of Mathematics

سال: 1984

ISSN: 0035-7596

DOI: 10.1216/rmj-1984-14-4-987