例句與造句

1. Sheaf cohomology can be identified with a type of Ext group.
2. The Ext groups are designed to measure the failure of Hom's preservation of algebraic structure, so this is a reasonable step.
3. The Ext groups can also be interpreted in terms of exact sequences; this has the advantage that it does not rely on the existence of projective or injective modules.
4. and that vanishes if is odd, so the dimensions of all such Ext groups in category " O " are determined in terms of coefficients of Kazhdan Lusztig polynomials.
5. Conversely, the relation between Kazhdan Lusztig polynomials and the Ext groups theoretically can be used to prove the conjectures, although this approach to proving them turned out to be more difficult to carry out.
6. It's difficult to find ext group in a sentence. 用ext group造句挺難的
7. These Ext groups can also be computed via a projective resolution of "'Z "', the advantage being that such a resolution only depends on " G " and not on " M ".
8. In algebraic topology, the "'doomsday conjecture "'was a conjecture about Ext groups over the Steenrod algebra made by Joel Cohen, named by Michael Barratt, published by and disproved by . stated a modified version called the "'new doomsday conjecture " '.