Diagrammatically speaking, grammatical calculi such as pregroups provide wires between words in order to elucidate their interactions, and this enables one to verify grammatical correctness of phrases and sentences. In this paper we also provide wiri
ngs within words. This will enable us to identify grammatical constructs that we expect to be either equal or closely related. Hence, our work paves the way for a new theory of grammar, that provides novel grammatical truths'. We give a nogo-theorem for the fact that our wirings for words make no sense for preordered monoids, the form which grammatical calculi usually take. Instead, they require diagrams -- or equivalently, (free) monoidal categories.
In this paper, we present a numerical algorithm for solving linear integro differential Volterra-Friedholm equations by using spline polynomials of degree ninth with six collocation points. The Fredholm-Volterra equation is converted into a system of
first-order linear differential equations, which is solved by applying polynomials and their derivatives with collocation points. The convergence of the proposed method is demonstrated when it is applied to above problem. To test the effectiveness and accuracy of this method, two test problems were resolved where comparisons could be used with other results taken from recent references to the high resolution provided by spline approximations.
تظهر المعادلة التفاضلية االعتيادية في الكثير من التجارب الفيزيائية والكيميائية وكذلك الهندسية وتعرف على انها العالقة بين متغير مستقل واحد فقط مع اشتقاقات المتغير المعتمد.وعندما يكون حل المعادالت التفاضلية االعتيادية غير ممكن نلجأ الى الطرق العددية ومنها طريقة الفروقات المنتهية.
في هذا البحث درسنا حل المعادالت التفاضلية الجزئية باستخدام الطرق العددية . تناول البحث دراسة حل المعادلات التفاضلية الجزئية من النوع الماكفئ و الناقصي و الزائدي ، وتم استخدام طريقة الشبكة للعقد العددية و التي تمثل حالة من
حاالت الفروق المحددة . حيث
ميزنا في البحث نوعين من الحل وهما الحل الداخلي و الحل الحدودي حيث الحل الداخلي
يعتمد على العقد الداخلية للشبكة اما الحل الحدودي فيعتمد على العقد الحدودية للشبكة باالضافة الى ايجاد الحل التحليلي
للمعادلات لمقارنة النتائج ، كما تطرقنا الى ايجاد حل مسألة البالس و مسألة بواسون ومسألة ديريشيلي الحدودية الهمية
هذه المعادلات في الجانب التطبيقي تم استخدام برنامج ماتالب لايجاد قيم الجداول لقيم الفروقات الحدودية. قمنا باشتقاق صيغة جديدة تعالج مسألة حل المعادلات التفاضلية الجزئية التي تحتوي على ثالث متغيرات مستقلة.
In this work, we present programming solutions for some nonlinear partial differential equations, which are the advection equation, the third-order KdV
equations, and a family of Burgers' equations.
In this paper, we present approximate solutions for the
Advection equation by finite differences method. In this method we
convert the nonlinear partial differential equation into a system of
nonlinear equations by some finite differences methods.
Then this
system was solved by Newton's method. And we made a program
implementing this algorithm and we checked the program using
some examples, which have exact solutions, then we evaluate our
results. As a conclusion we found that this method gives accurate
results for Advection equation.
In this paper, we introduce an algorithm to solve the
Advection equation by finite element method. In this method, we
have chosen Three pattern of cubic B-Spline to approximate the
nonlinear solution to convert the nonlinear PDE into a system of
ODE, Then we solved this system equation by SSP-RK54 method,
And we made a program implementing this algorithm and we
checked the program using some examples, which have exact
solutions, then we evaluate our results. As a conclusion we found
that this method gives accurate results for advection equation.
In this paper, we find distributional solutions of boundary value
problems in Sobolev spaces. This solution will be given as Fourier
series with respect to the Eigen functions of a positive definite
operator and its square roots.
Then, we obtain solutions of such problems of a real order.
In this paper we used Liapunov’s Second Method for study of
stability of differential equations system with delay.
دراسة حول البعد المنتهي للمؤثر* A ̂S ̂-S ̂ A ̂ في الفضاء[0,∞] L_m^2 تشمل الرسالة على مقدمة وفصلين في الفصل الأول استعرضنا بشكل موجز الدراسات والابحاث ذات الصلة
