• Về vành nửa hoàn chỉnh có đế cốt yếu thỏa mãn điều kiện nội xạ béVề vành nửa hoàn chỉnh có đế cốt yếu thỏa mãn điều kiện nội xạ bé

    1. GIỚI THIỆU Trong bài báo này, chúng ta giả sử rằng mọi vành là kết hợp có đơn vị 1≠0, và mọi môđun là đơn nguyên. Với mỗi môđun M trên vành R ta viết MR (RM, tương ứng) để chỉ rằng M là một R-môđun phải (trái, tương ứng). Chúng ta ký hiệu phạm trù các R-môđun phải (R-môđun trái, tương ứng) bởi Mod-R (R-Mod, tương ứng). Trước hết nhắc lạ...

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  • Đánh giá năng lực giải quyết vấn đề của học sinh ở nội dung thống kêĐánh giá năng lực giải quyết vấn đề của học sinh ở nội dung thống kê

    Tóm tắt: Thống kê là một ngành khoa học ngày càng được sử dụng phổ biến trong nhiều lĩnh vực hoạt động của con người. Năng lực giải quyết vấn đề là một trong những thành phần cốt lõi giúp hình thành và phát triển năng lực Toán học cho học sinh. Bài viết này đề xuất một thang đánh giá năng lực giải quyết vấn đề ở nội dung Thống kê, dựa vào đó đá...

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  • Solvability of multipoint BVPs at resonance for various kernelsSolvability of multipoint BVPs at resonance for various kernels

    1. INTRODUCTION In the theory of partial differential equations such as the method of separation of variables, we encounter differential equations for several parameters with some requirement of solutions which is called multi-point boundary condition. This then leads to an extensive development of spectral theory with multi-parameter [1]. Many...

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  • Periodic solutions to a class of differential variational inequalities in banach spacesPeriodic solutions to a class of differential variational inequalities in banach spaces

    Abstract. In this work, we consider a model formulated by a dynamical system and an elliptic variational inequality. We prove the solvability of initial value and periodic problems. Finally, an illustrative example is given to show the applicability of our results. Keywords: Elliptic variational inequalities, periodic solution, fixed point theo...

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  • A note on stable solutions of a sub-elliptic system with singular nonlinearityA note on stable solutions of a sub-elliptic system with singular nonlinearity

    In this decade, much attention has been paid to study the elliptic equations and elliptic systems involving degenerate operators such as the Grushin operator [13-18], the ∆λ- Laplacian [3-7] and references given there. Remark that the Grushin operator is a typical example of ∆λ-Laplacian, see [1] for further properties of the operator ∆λ. As fa...

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  • The generalized convolution for h-Laplace transform on time scaleThe generalized convolution for h-Laplace transform on time scale

    1. Introduction The Laplace transform theory has been studied from the 17th century. The Fourier transform has been studied from the 19th century together with the Fourier cosine, Fourier sine transforms and convolution of two functions for Fourier transform. The Laplace transform, the Fourier transform, Fourier cosine and Fourier sine transfor...

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  • Ultimate stability of nonlinear time-varying systems with multiple delaysUltimate stability of nonlinear time-varying systems with multiple delays

    Abstract. The ultimate stability of nonlinear time-varying systems with multiple delays and bounded disturbances are investigated in this paper. Based on some comparison techniques via differential inequalities, explicit delay-independent conditions are derived for determining an ultimate bound such that all state trajectories of the system con...

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  • Training pre-service teacher competence to integrate interdisciplinary knowledge to solve problems in practice through the integrated topic in general physics moduleTraining pre-service teacher competence to integrate interdisciplinary knowledge to solve problems in practice through the integrated topic in general physics module

    Abstract. In higher education, it is essential to change teaching method toward the learnercentered orientation. Teaching through topics with practical content is one of the preferred options today. Problems in real-life contain complex elements that are almost impossible to explain by just one subject. The paper presents the method of organizing...

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  • Experiences of improving mathematical communication competence for Vietnamese secondary school through theme “Solving problem by setting up system of equations”Experiences of improving mathematical communication competence for Vietnamese secondary school through theme “Solving problem by setting up system of equations”

    Abstract. This paper aims to discuss our experiences of promoting mathematical communication competence for students at secondary school in Vietnam. In this research, we applied the qualitative research that consists of the designed experiment and the participant’s observation method. From result experiment, we show out detail about Vietnamese ...

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  • Improving expression ability of diferent language forms for elementary students through mathematics problem-Solving instructionImproving expression ability of diferent language forms for elementary students through mathematics problem-Solving instruction

    1. Introduction Language is the reflection of thinking, the development of language for students, especially for elementary students, on that basis, it will contribute to their thinking development. At elementary level, students receive basic scientific knowledge through exploring the world. Thus, language plays a major role in conveying knowle...

    pdf7 trang | Chia sẻ: thanhle95 | Ngày: 14/07/2021 | Lượt xem: 349 | Lượt tải: 0