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can be seen as a sheaf of planes intersecting in a line at infinity. To distinguish it from the more general definition, the adjective
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132:"Classification of Geometries with Projective Metric"
136:Proceedings of the Edinburgh Mathematical Society
76:can be added to it, resulting in the expression
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60:When extending the concept of line to the
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130:Sommerville, D. M. Y. (1909).
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47:. It may also be known as a
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43:that have the same common
149:10.1017/S0013091500034763
163:Vitutor: Sheaf of Planes
78:parallel sheaf of planes
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39:is the set of all
35:In mathematics, a
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180:Planes (geometry)
118:Mathworld Wolfram
16:(Redirected from
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63:line at infinity
54:pencil of planes
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116:Definition on
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98:half-planes
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142:: 25–41.
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84:See also
74:parallel
41:planes
104:Notes
51:or a
45:line
144:doi
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