projective class group造句
例句与造句
- It is even unknown if the Whitehead group of " F " ( see Whitehead torsion ) or the projective class group of " F " ( see Wall's finiteness obstruction ) is trivial, though it easily shown that " F " satisfies the Strong Bass Conjecture.
- It's difficult to find projective class group in a sentence. 用projective class group造句挺难的