Examples: first, tex2html_wrap84 and second, tex2html_wrap85 churn class.

Characteristic classes are a property of the bundle rather than the particular connection on the bundle.

Defined in terms of invariant polynomials.

characteristic class: collection of classes that depends on bundle but not on a choice of connection. tex2html_wrap86

tex2html_wrap87 is a homomorphism, known as the Weil homomorphism.

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