Classify of Stiefel-Whitney

In Geometry, the classes of Stiefel-Whitney are classes characteristic associated with the vectorial real fibers of finished row.

They thus constitute a real analog of the classes of Chern in the complex case.

It bear the name of Hassler Whitney and Eduard Stiefel.

Any characteristic class associated with fibers vectorial realities seems a polynomial in the classes of Stiefel-Withney.

Axiomatic

Classification of the characteristic classes

Cohomology of the grassmanniennes

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