Pontryagin Class
In mathematics, the Pontryagin classes are certain characteristic classes. The Pontryagin class lies in cohomology groups with degree a multiple of four. It applies to real vector bundles.
Read more about Pontryagin Class: Definition, Properties, Pontryagin Numbers, Generalizations
Famous quotes containing the word class:
“I know no East or West, North or South, when it comes to my class fighting the battle for justice. If it is my fortune to live to see the industrial chain broken from every workingman’s child in America, and if then there is one black child in Africa in bondage, there shall I go.”
—Mother Jones (1830–1930)