scholarly journals Integrality of the Chern character in small codimension

2012 ◽  
Vol 231 (2) ◽  
pp. 855-878 ◽  
Author(s):  
Olivier Haution
Keyword(s):  
Chern Character ◽  
Small Codimension

scholarly journals Higher spectral flow and an entire bivariant JLO cocycle

2012 ◽  
Vol 11 (1) ◽  
pp. 183-232 ◽  
Author(s):  
Moulay-Tahar Benameur ◽  
Alan L. Carey
Keyword(s):  
Dirac Operator ◽  
Chern Character ◽  
Dirac Operators ◽  
Cyclic Cohomology ◽  
Closed Manifold ◽  
Spectral Flow ◽  
Smooth Functions ◽  
Base Manifold ◽  
K Theory ◽  
Higher Spectral Flow

AbstractFor a single Dirac operator on a closed manifold the cocycle introduced by Jaffe-Lesniewski-Osterwalder [19] (abbreviated here to JLO), is a representative of Connes' Chern character map from the K-theory of the algebra of smooth functions on the manifold to its entire cyclic cohomology. Given a smooth fibration of closed manifolds and a family of generalized Dirac operators along the fibers, we define in this paper an associated bivariant JLO cocycle. We then prove that, for any l ≥ 0, our bivariant JLO cocycle is entire when we endow smoooth functions on the total manifold with the Cl+1 topology and functions on the base manifold with the Cl topology. As a by-product of our theorem, we deduce that the bivariant JLO cocycle is entire for the Fréchet smooth topologies. We then prove that our JLO bivariant cocycle computes the Chern character of the Dai-Zhang higher spectral flow.

scholarly journals Chern character for twisted K-theory of orbifolds

2006 ◽  
Vol 207 (2) ◽  
pp. 455-483 ◽  
Author(s):  
Jean-Louis Tu ◽  
Ping Xu
Keyword(s):  
Chern Character ◽  
K Theory

scholarly journals On the Chern character of a theta-summable Fredholm module

1989 ◽  
Vol 84 (2) ◽  
pp. 343-357 ◽  
Author(s):  
Ezra Getzler ◽  
András Szenes
Keyword(s):  
Chern Character ◽  
Fredholm Module

scholarly journals Superconnections and the Chern character

Topology ◽  
1985 ◽  
Vol 24 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Daniel Quillen
Keyword(s):  
Chern Character

Loop spaces, cyclic homology and the Chern character

1989 ◽  
pp. 95-108
Author(s):  
E. Getzler ◽  
J.D.S. Jones ◽  
S.B. Petrack
Keyword(s):  
Chern Character ◽  
Cyclic Homology ◽  
Loop Spaces

scholarly journals Chern Character in Twisted K -Theory: Equivariant and Holomorphic Cases

2003 ◽  
Vol 236 (1) ◽  
pp. 161-186 ◽  
Author(s):  
Varghese Mathai ◽  
Danny Stevenson
Keyword(s):  
Chern Character ◽  
K Theory

scholarly journals Finiteness theorems for algebraic cycles of small codimension on quadric fibrations over curves

2009 ◽  
Vol 7 (4) ◽  
Author(s):  
Cristian González-Avilés
Keyword(s):  
Algebraic Cycles ◽  
Finitely Generated ◽  
Relative Dimension ◽  
Finiteness Theorems ◽  
Small Codimension

AbstractWe obtain finiteness theorems for algebraic cycles of small codimension on quadric fibrations over curves over perfect fields. For example, if k is finitely generated over ℚ and X → C is a quadric fibration of odd relative dimension at least 11, then CH i(X) is finitely generated for i ≤ 4.

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