compactly supported homology造句

:: : : : : Yes, there's a " problem " with non-compact manifolds which you can fix by taking compactly supported homology.
An example of an algebraic invariant of topological spaces which is not homotopy-invariant is compactly supported homology ( which is, roughly speaking, the homology of the compactification, and compactification is not homotopy-invariant ).
It's difficult to find compactly supported homology in a sentence. 用compactly supported homology造句挺难的