Read More
Date: 25-7-2021
1509
Date: 18-7-2021
1287
Date: 9-8-2021
1261
|
The cup product is a product on cohomology classes. In the case of de Rham cohomology, a cohomology class can be represented by a closed form. The cup product of and is represented by the closed form , where is the wedge product of differential forms. It is the dual operation to intersection in homology.
In general, the cup product is a map
which satisfies , where is the th cohomology group.
|
|
علامات بسيطة في جسدك قد تنذر بمرض "قاتل"
|
|
|
|
|
أول صور ثلاثية الأبعاد للغدة الزعترية البشرية
|
|
|
|
|
وفد كلية الزراعة في جامعة كربلاء يشيد بمشروع الحزام الأخضر
|
|
|