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1 неособая кривая второго порядка
Mathematics: nonsingular conicУниверсальный русско-английский словарь > неособая кривая второго порядка
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Oval (projective plane) — In mathematics, an oval in a projective plane is a set of points, no three collinear, such that there is a unique tangent line at each point (a tangent line is defined as a line meeting the point set at only one point, also known as a 1 secant).… … Wikipedia
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Quadratic form — In mathematics, a quadratic form is a homogeneous polynomial of degree two in a number of variables. For example, is a quadratic form in the variables x and y. Quadratic forms occupy a central place in various branches of mathematics, including… … Wikipedia
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Plücker formula — In mathematics, a Plücker formula is one of an extensive family of counting formulae, of a type first developed in the 1830s by Julius Plücker, that relate the extrinsic geometry of algebraic curves in projective space to intrinsic invariants… … Wikipedia