Schemes over fields

A method for constructing a blind signature scheme based on a hidden discrete logarithm problem defined in finite non-commutative associative algebras is proposed. Blind signature protocols are constructed using four-dimensional and six-dimensional algebras defined over a ground finite field GF(p) and containing a global two-sided unit as an algebraic support. The basic properties of the used algebra, which determine the choice of protocol parameters, are described.

15p spiritedaway36 25-11-2021 12 1   Download

Front line demonstration (FLD) is an appropriate means for demonstration as well as transfer of improved agricultural innovations to the farming community. Under centrally sponsored scheme on oilseed production technology under NMOOP scheme, AEEC, Lingsugur has conducted 32 front line demonstrations in farmer’s fields during 2017-18 over an area of 12.8 ha on sunflower production technology to transfer the latest technologies among the farmers of Lingsugur taluka of Raichur district.

5p kethamoi5 03-06-2020 12 0   Download

The effect of the periodic oscillation of the gravitational field, known as g-jitter, on the free convection from a vertical plate is investigated in the present paper. The problem has been simplified by the laminar boundary layer and Boussinesq approximations. The fully implicit finite-difference scheme is used to solve the dimensionless system of the governing equations. The results for laminar flow of air (Pr = 0.72) and water (Pr = 7.00) are presented for different values of the amplitudes and frequencies of the g-jitter.

11p 12120609 01-06-2020 23 1   Download

Spectrum of a Ring, Fiber products, Schemes over fields, Local Properties of Schemes, Representable Functors, Separated morphisms, Finiteness Conditions, Affine and proper morphisms,... As the main contents of the Tài liệu Algebraic geometry 1. Invite you to consult.

621p daicatho1989 13-03-2016 59 5   Download

Invite you to consult the document content, "Algebraic Geometry I" below. Contents of the document referred to the content you: Prevarieties, Spectrum of a Ring, Fiber products, Schemes over fields, Local Properties of Schemes, Representable Functors, Separated morphisms,...

621p daicatho1989 25-01-2016 50 4   Download

For an -adic sheaf on a variety of arbitrary dimension over a perfect field, we define the Swan class measuring the wild ramification as a 0-cycle class supported on the ramification locus. We prove a Lefschetz trace formula for open varieties and a generalization of the Grothendieck-Ogg-Shararevich formula using the Swan class. Let F be a perfect field and U be a separated and smooth scheme of finite type purely of dimension d over F . In this paper, we study ramification of a finite ´tale scheme V over U along the boundary, by introducing a map (0.1)...

65p dontetvui 17-01-2013 33 7   Download

Let X be a smooth quasiprojective subscheme of Pn of dimension m ≥ 0 over Fq . Then there exist homogeneous polynomials f over Fq for which the intersection of X and the hypersurface f = 0 is smooth. In fact, the set of such f has a positive density, equal to ζX (m + 1)−1 , where ζX (s) = ZX (q −s ) is the zeta function of X. An analogue for regular quasiprojective schemes over Z is proved, assuming the abc conjecture and another conjecture. 1. Introduction The classical Bertini theorems say that if a subscheme...

30p tuanloccuoi 04-01-2013 47 7   Download

Saad Ibrahim has over 30 years of diversified experience in the Petroleum Industry in Western Canada and internationally, including projects in Libya, Yemen, Kazakstan, Venezuela and Argentina, with special expertise in reservoir engineering with emphasis on field development planning, evaluation of depletion strategies and production optimization of a wide spectrum of oil and gas fields.

209p annguyenvt 24-12-2010 259 122   Download