| 11. | Generally, the structure of projective modules is difficult to determine.
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| 12. | The homography group on this projective line is the modular group.
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| 13. | But orthogonal quantum states can always be distinguished via projective measurements.
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| 14. | The projector head is far more stable than traditional projective systems.
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| 15. | Any finite projective plane of order is an ( ( configuration.
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| 16. | Consider a projective plane P . Let L be a line.
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| 17. | A fortiori, every module also admits projective and flat resolutions.
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| 18. | Alternatively, it is an indecomposable, projective, cyclic module.
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| 19. | Such a ( projective ) completion always exists and is unique.
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| 20. | Grothendieck showed that the Hilbert scheme always exists for projective varieties.
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