projective line


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projective line

[prə′jek·tiv ′līn]
(mathematics)
The line obtained from the stereographic projection of the circle.
References in periodicals archive ?
over the regular bipyramid over Q is a direct product with the projective line [P.
a toric fiber bundle over a projective line with generic fiber isomorphic to the direct product of [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] copies of [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII].
Coverage includes a guide to closure operations in commutative algebra, a survey of test ideals, finite-dimensional vector spaces with Frobenius action, finiteness and homological conditions in commutative group rings, regular pullbacks, noetherian rings without finite normalization, Krull dimension of polynomial and power series rings, the projective line over the integers, on zero divisor graphs, and a closer look at non-unique factorization via atomic decay and strong atoms.
Potential theory and dynamics on the Berkovich projective line.
Finally, they seek to use the case of the Berkovich projective line as a means of introduction to Berkovich's theory of analytic spaces.
Of the 19 invited lectures, 12 are reproduced here, and discuss such topics as the Strominger-Yau-Zaslow (SYZ) mirror transformation, Ruan's conjecture and integral structures in quantum cohomology, two dimensional topological strings and gauge theory, and weighted projective lines associated with regular systems of weights of dual type.
Horton's poetry engages multiple voices and circumstances through a range of poetic forms, including prose poems, blues-infused couplets, and projective lines.