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Date: 10-6-2021
1657
Date: 30-5-2021
2002
Date: 11-5-2021
1307
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An operation that takes two vector bundles over a fixed space and produces a new vector bundle over the same space. If and are vector bundles over , then the Whitney sum is the vector bundle over such that each fiber over is naturally the direct sum of the and fibers over .
The Whitney sum is therefore the fiber for fiber direct sum of the two bundles and . An easy formal definition of the Whitney sum is that is the pull-back bundle of the diagonal map from to , where the bundle over is .
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كل ما تود معرفته عن أهم فيتامين لسلامة الدماغ والأعصاب
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ماذا سيحصل للأرض إذا تغير شكل نواتها؟
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جامعة الكفيل تناقش تحضيراتها لإطلاق مؤتمرها العلمي الدولي السادس
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