Cayley transform, outer exponential and spinor norm
Characteristic classes for -bundles
The authors generalize a construction of Connes by defining for an -bundle over smooth manifold and a reduced cyclic cohomology class a sequence of de Rham cohomology classes . Here is a convenient algebra, defined by the authors, and is a locally trivial bundle with standard fibre a right finitely generated projective -module and bounded -modules homomorphisms as transition functions.
Circular vectors and toroidal matrices
Summary: Arrays of numbers may be written not only on a line (= ``a vector'') or in the plain (= ``a matrix'') but also on a circle (= ``a circular vector''), on a torus (= ``a toroidal matrix'') etc. In the latter case, the immanent index-rotation ambiguity converts the standard ``scalar'' product into a binary operation with several interesting properties.
Clifford algebra with Reduce
Cohomology and connection on -bundles
Complex cohomology automorphisms of compact homogeneous spaces of positive Euler characteristic
Conformal invariant wave equations for spin zero and spin fields on de Sitter space
Conformal transformation, conformal change, and conformal covariants
Conformally invariant wave equations in -de Sitter linear gravity
Connection theory and parameter transformations
Constrained Hamiltonians: a homological approach
Correspondence between maximal ideals in associative algebras and Lie algebras