# Differential form

Xem 1-20 trên 76 kết quả Differential form
• ### Báo cáo hóa học: " Caratheodory operator of differential forms"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : Caratheodory operator of differential forms

• ### Báo cáo hóa học: " Research Article Some Caccioppoli Estimates for Differential Forms"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Some Caccioppoli Estimates for Differential Forms

• ### Mathematics Differential Geometry

These notes were developed as a supplement to a course on Differential Geometry at the advanced undergraduate, first years graduate level, which by author has taught for several years. These many axcellent good text in Differential Geometry bye very few have an early introduction to differential forms and their applications to Physisc

• ### Second-order ordinary differential equations

n mathematics, an ordinary differential equation (abbreviated ODE) is an equation containing a function of one independent variable and its derivatives. There are many general forms an ODE can take, and these are classified in practice (see below).[1][2] The derivatives are ordinary because partial derivatives only apply to functions of many independent variables (see Partial differential equation).

• ### Báo cáo " Periodic solutions of some linear evolution systems of natural differential equations on 2-dimensional tore "

In this paper we study periodic solutions of the equation $$\label{a} \frac{1}{i}\left( \frac{\partial}{\partial t}+aA \right)u(x,t)=\nu G (u-f),$$ with conditions $$\label{b} u_{t=0}=u_{t=b}, \,\, \int_X (u(x),1) \, dx =0$$ over a Riemannian manifold $X$, where $$G u(x,t)=\int_Xg(x,y)u(y)dy$$ is an integral operator, $u(x,t)$ is a differential form on $X,$ $A=i(d+\delta)$ is a natural differential operator in $X$. We consider the case when $X$ is a tore $\Pi^2$.

• ### Applied Computational Fluid Dynamics Techniques: An Introduction Based on Finite Element Methods

Computational fluid dynamics (CFD) is concerned with the efficient numerical solution of the partial differential equations that describe fluid dynamics. CFD techniques are commonly used in the many areas of engineering where fluid behavior is an important factor. Traditional fields of application include aerospace and automotive design, and more recently, bioengineering and consumer and medical electronics.

• ### Deterministic Methods in Systems Hydrology

This work is intended to survey the basic theory that underlies the multitude of parameter-rich models that dominate the hydrological literature today. It is concerned with the application of the equation of continuity (which is the fundamental theorem of hydrology) in its complete form combined with a simplified representation of the principle of conservation of momentum. Since the equation of continuity can be expressed in linear form by a suitable choice of state variables and is also parameterfree, it can be readily formulated at all scales of interest.

• ### A New Angle on Sovereign Credit Risk - E-RISC: Environmental Risk Integration in Sovereign Credit Analysis

1 Generally speaking, the better your credit, the lower the cost of obtaining that credit, usually in the form of interest rates and fees. That means, you’ll have more available for savings and spending. Lenders will have more conﬁdence in your ability and commitment to repay the loan on time and in full. Conversely, if your credit history is not strong, you’ll probably pay higher interest rates and fees and have less money available for savings and spending. You could end up being short on money and playing “catch-up,” juggling between payments on several bills.

• ### Zero as a Special Price: The True Value of Free Products

Inspired by the work of Dubois and Laurent (1994), Leibenstein (1950), Mason (1992), Kapferer (1998), Eastman et al. (1999) Phau and Prendergast (2000), and Dubois et al. (2001) on the evaluation of luxury brands, Vigneron and Johnson (2004) developed a framework of ‗brand luxury index‘ proposing that the luxury-seeking consumer‘s decision-making process can be explained by five main factors that form a semantic network.

• ### AGRICULTURAL TRADE IN THE GREATER MEKONG SUB-REGION: The Case of Cassava and Rubber in Cambodia

A key reason is that agricultural production has few technical (dis) economies of scale, implying that a range of production forms can coexist. A look at the 300 or so publicly listed companies in table 4 illustrates this point. Even though farming accounts for 22 percent of the global agricultural value chain, it makes up a mere 0.2 percent of equity market capitalization. As of October 2009, there were only seven publicly listed farming companies worldwide, three in Brazil and Argentina and four in Ukraine and Russia.

• ### Introductory Finite Volume Methods for PDEs

This material is taught in the BSc. Mathematics degree programme at the Manchester Metropolitan University, UK. The Finite Volume Method (FVM) is taught after the Finite Difference Method (FDM) where important concepts such as convergence, consistency and stability are presented. The FDM material is contained in the online textbook, ‘Introductory Finite Difference Methods for PDEs’ which is free to download from:

• ### Output of a Seminar on Energy Conservation in Paper and Pulp Industry

An overview of the research plan is shown in Figure 3. Paper I covers the background in the form of literature review. Paper II focuses on the optimisation of hot water treatment prior to alkaline peroxide bleaching and on the mechanical refining of hot water treated straw. Paper III focuses on the optimisation of alkaline peroxide bleaching and Paper IV focuses on the chemical pre-treatment/storage of wheat straw. Paper V evaluates the obtained results.

• ### Partial Differential Equations part 4

The correct way to difference Schr¨ dinger’s equation [1,2] is to use Cayley’s o form for the ﬁnite-difference representation of e−iHt , which is second-order accurate and unitary: e−iHt In other words, n+1 n 1 + 1 iH∆t ψj = 1 − 1 iH∆t ψj 2 2

• ### Partial Differential Equations part 6

The best way to solve equations of the form (19.4.28), including the constant coefﬁcient problem (19.0.3), is a combination of Fourier analysis and cyclic reduction, the FACR method [3-6]. If at the rth stage of CR we Fourier analyze the equations of the form (19.4.32) along y

• ### ON A PERIODIC BOUNDARY VALUE PROBLEM FOR SECOND-ORDER LINEAR FUNCTIONAL DIFFERENTIAL EQUATIONS S.

ON A PERIODIC BOUNDARY VALUE PROBLEM FOR SECOND-ORDER LINEAR FUNCTIONAL DIFFERENTIAL EQUATIONS S. MUKHIGULASHVILI Received 26 October 2004 and in revised form 7 March 2005 Unimprovable eﬃcient suﬃcient conditions are established for the unique solvability of the periodic problem u (t) = (u)(t) + q(t) for 0 ≤ t ≤ ω, u(i) (0) = u(i) (ω) (i = 0,1), where ω 0, : C([0,ω]) → L([0,ω]) is a linear bounded operator, and q ∈ L([0,ω]). 1. Introduction Consider the equation u (t) = (u)(t) + q(t) for 0 ≤ t ≤ ω with the periodic boundary conditions u(i) (0) = u(i)...

• ### ON A BOUNDARY VALUE PROBLEM FOR NONLINEAR FUNCTIONAL DIFFERENTIAL EQUATIONS ROBERT HAKL Received 21

ON A BOUNDARY VALUE PROBLEM FOR NONLINEAR FUNCTIONAL DIFFERENTIAL EQUATIONS ROBERT HAKL Received 21 August 2004 and in revised form 1 March 2005 We consider the problem u (t) = H(u)(t) + Q(u)(t), u(a) = h(u), where H,Q : C([a,b];R) αβ → L([a,b];R) are, in general, nonlinear continuous operators, H ∈ ab (g0 ,g1 , p0 , p1 ), and h : C([a,b];R) → R is a continuous functional. Eﬃcient conditions suﬃcient for the solvability and unique solvability of the problem considered are established. 1.

• ### CHAPTER 5 INFINITE SEQUENCES AND SERIES - SERIES

We can add the terms of a sequence {an } and get an expression of the form: a1+ a2+ a3+ …+ an + … which is called a series and denoted by However what does it mean by the sum of infinitely many terms? Example. We can try to add the terms of the series 1+2+3+…+n+… and get the cumulative sums 1, 3, 6, 10, …, The nth sum n(n+1)/2 becomes very large as n increases

• ### Sexual and Reproductive Health and Rights

In extreme cases of mental disability, substituted judgment may be appropriate when a severe emotional disturbance or cognitive impairment compromises an individual’s ability to give informed consent. Any restriction or denial of decision-making author- ity to a disabled woman should be the consequence of an objective procedure, con- taining proper legal safeguards against every form of abuse. This procedure must be based on an evaluation of the capability of the mentally disabled person by qualified experts, subject to periodic review and to appeal.

• ### .Numerical Methods for Ordinary Diﬀerential EquationsNumerical Methods for Ordinary Differential

.Numerical Methods for Ordinary Diﬀerential Equations Numerical Methods for Ordinary Differential Equations, Second Edition. J. C. Butcher © 2008 John Wiley & Sons, Ltd. ISBN: 978-0-470-72335-7 ..Numerical Methods for Ordinary Diﬀerential Equations Second Edition J. C. Butcher The University of Auckland, New Zealand .Copyright c 2008 John Wiley & Sons Ltd, The Atrium, Southern Gate, Chichester, West Sussex PO19 8SQ, England Telephone (+44) 1243 779777 Email (for orders and customer service enquiries): cs-books@wiley.co.uk Visit our Home Page on www.wileyeurope.com or www.wiley.