| 21. | What are the dimensions of the spin ( projective ) representations?
|
| 22. | Topologically, the real projective line is homeomorphic to the circle.
|
| 23. | The real projective line is the boundary of the hyperbolic plane.
|
| 24. | The real projective line is the set of all equivalence classes.
|
| 25. | Projectivization of the Euclidean plane produced the real projective plane.
|
| 26. | Any connected sum involving a real projective plane is nonorientable.
|
| 27. | This notion finds utility in projective geometry and complex analysis.
|
| 28. | For the projective theory see Quadric ( projective geometry ).
|
| 29. | For the projective theory see Quadric ( projective geometry ).
|
| 30. | The construction of projective scheme is an instance of the Proj construction.
|
