Примеры использования Complex projective на Английском языке и их переводы на Русский язык
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Federigo Enriques(1914, 1949) described the classification of complex projective surfaces.
The Riemann sphere(also called complex projective line) is simply-connected and hence its first singular homology is zero.
Let C P 1{\displaystyle\mathbb{CP}^{1}} be the Riemann sphere:1-dimensional complex projective space.
An example is the infinite-dimensional complex projective space, with sequence 1, 0, 1, 0, 1,… that is periodic, with period length 2.
Rational surface means surface birational to the complex projective plane P2.
It can be realized in the complex projective plane as the set of inflection points of an elliptic curve, but it has no realization in the Euclidean plane.
The fundamental group π1(X)is a birational invariant for smooth complex projective varieties.
The Hesse configuration can be realized in the complex projective plane as the 9 inflection points of an elliptic curve and the 12 lines through triples of inflection points.
A curve in this context is defined by a non-degenerate algebraic equation in the complex projective plane.
Because compact Riemann surfaces are synonymous with non-singular complex projective algebraic curves, a Hurwitz surface can also be called a Hurwitz curve.
This example also shows that the Sylvester-Gallai theorem cannot be generalized to the complex projective plane.
Its goal is to construct a birational model of any complex projective variety which is as simple as possible.
It is not possible to draw points and lines having this pattern of incidences in the Euclidean plane, butit is possible in the complex projective plane.
Kantor's solution for p 4,a pair of mutually-inscribed quadrilaterals in the complex projective plane, is called the Möbius-Kantor configuration.
The standard counterexample is complex projective space with the Fubini-Study metric; sectional curvatures of this metric take on values between 1 and 4, with endpoints included.
It has two cusp singularities in the real plane, anda double point in the complex projective plane at x=0, z=0.
Each curve in the pencil passes through the nine points of the complex projective plane whose homogeneous coordinates are some permutation of 0, -1, and a cube root of unity.
In birational geometry, a complex rational surface is any algebraic surface birationally equivalent to the complex projective plane.
The Hesse configuration of nine inflection points of a cubic curve in the complex projective plane and the twelve lines determined by pairs of these points.
These lines exist in the complex projective plane, but it is possible to define quartic curves for which all 28 of these lines have real numbers as their coordinates and therefore belong to the Euclidean plane.
Max Noether andCastelnuovo showed that the Cremona group of birational automorphisms of the complex projective plane is generated by the"quadratic transformation"↦ together with the group PGL(3,C) of automorphisms of P2.
For p 4 there is no solution in the Euclidean plane, but Kantor(1882) found pairs of polygons of this type, for a generalization of the problem in which the points andedges belong to the complex projective plane.
It is not realizable in the Euclidean plane butis realizable in the complex projective plane as the nine inflection points of an elliptic curve with the 12 lines incident with triples of these.
If the form is Z{\displaystyle\mathbb{Z}}, there are two manifolds depending on the Kirby-Siebenmann invariant:one is 2-dimensional complex projective space, and the other is a fake projective space, with the same homotopy type but not homeomorphic and with no smooth structure.
The geometric genus can be defined for non-singular complex projective varieties and more generally for complex manifolds as the Hodge number hn, 0(equal to h0,n by Serre duality), that is, the dimension of the canonical linear system plus one.
The"Weak factorization theorem", proved by Abramovich, Karu, Matsuki, and Włodarczyk(2002),says that any birational map between two smooth complex projective varieties can be decomposed into finitely many blow-ups or blow-downs of smooth subvarieties.
With application of the complex the projective objective for nanolithograph with working wavelength 13.5 nm was developed and made.
Projective and injective descriptions in the complex domain.
The Klein quartic is the projective variety over the complex numbers C defined by the quartic polynomial x3y+ y3z+ z3x 0.
Severi asked if there was a complex surface homeomorphic to the projective plane but not biholomorphic to it.