Back Pontrjagin-Klasse German Classe de Pontriaguine French ポントリャーギン類 Japanese 폰트랴긴 특성류 Korean Classe de Pontryagin Portuguese Класс Понтрягина Russian Pontryaginklass Swedish Клас Понтрягіна Ukrainian
In mathematics, the Pontryagin classes, named after Lev Pontryagin, are certain characteristic classes of real vector bundles. The Pontryagin classes lie in cohomology groups with degrees a multiple of four.
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