 First Stiefel–Whitney class of a tensor product of real line bundles

ID: first-stiefel-whitney-class-of-a-tensor-product-of-real-line-bundles

H^{1} (X; F_{2})

, and tensor product corresponds to addition:

w_{1} (L \otimes L^{'}) = w_{1} (L) + w_{1} (L^{'}) .

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