作者以大学校园为背景，讲述一段在新恋情中反刍旧情伤的动人故事，书中结合异国风味的泡沫绿茶配方故事，颇具巧思。每杯饮料都带有一份爱情的心思。来自九杯泡沫绿茶的爱情密语，堕落者LMarch跟你一起探讨爱情的温柔与神秘。

《管理经济学》，着重注意以下几个问题的处理：一是如何与理论经济学教材中的微观经济学相区别；二是如何结合中国的企业环境，描述这些环境因素对企业决策的影响；三是如何结合每一篇章的内容寻找合适的中国案例。关于第一个问题，我们是严格从企业的角度出发，根据企业决策的需要考察和讨论微观经济问题。例如，我们在论述需求理论以后，专辟需求的估计和预测单间 节，在生产理论和成本理论之后，专设生产函数和成本函灵敏的经验估计章节，这些章节直接讨论企业实践中所面临的问题，操作性强，是微观经济学教材中所没有涉及到的。关于第二个问题，我们将中国企业所面临的政策环境与制度环境在严密的理论框架之下作了详细的分析（第三篇），尤其是对中国转轨经济中国有企业的产权安排演变及其对企业决策的影响进行了讨论。对于第三个问题，我们在每一篇（第一篇导论除外）处设置两个中国案例，如中国转轨时期住房市场需求的收入弹性分析，国有企业产出的计量分析，国有企业的内部股份制改革分析等等。总而言之，经过这些努力，我们希望这本《管理经济学》在理论深度上达到国际MBA教材标准这一前提之下，在教材的中国化方面有所贡献。当然，如前面所述，MBA教材在中国建设还是一件处于尝试阶段的事物，加之编写者学识和经验的不足，错误一定难免，恳请读者不吝指正。

暂缺简介...

这是一本电子工程专业的教材。本书强调场的计算以及理论关系的发展。全书分两部分，第一部分从各种不同的应用与基本关系联系起来的角度表述电磁场和麦克斯韦方程，第二部分给出了计算的方法。

Up until recently， Riemannian geometry and basic topology were not included， even by departments or faculties of mathematics， as compulsory subjects in a university-level mathematical education. The standard courses in the classical differential geometry of curves and surfaces which were given instead （and still are given in some places） gradually came to be viewed as anachronisms. However， there has been hitherto no unanimous agreement as to exactly how such courses should be brought up to date， that is to say，which parts of modern geometry should be regarded as absolutely essential to a modern mathematical education， and what might be the appropriate level of abstractness of their exposition The task of designing a modernized course in geometry was begun in 1971 in the mechanics division of the Faculty of Mechanics and Mathematics of Moscow State University. The subject-matter and level of abstractness of its exposition were dictated by the view that， in addition to the geometry，of curves and surfaces， the following topics are certainly useful in the various areas of application of mathematics （especially in elasticity and relativity，to name but two）， and are therefore essential： the theory of tensors （including eovariant differentiation of them）; Riemannian curvature;

This book is devoted to explaining a wide range of applications of continuous symmetry groups to physically important systems of differential equations. Emphasis is placed on significant applications of group-theoretic methods， organized so that the applied reader can readily learn the basic computational techniques required for genuine physical problems.本书为英文版。

本书是作者《经济增长中的产权问题》一书后尝试将产权经济学全面引入作者从事的专业学们——金融经济学，以奠定金融经济学的微观基础并全面更新金融经济学研究内容的第一个学术成果，也是国家自然科学基金，北京大学中国经济研究中心资助项目的科研成果。本书的许多成果直接得益于作者从事的《产权改革与我国专业银行向现代商业银行转化》这一国家自然科学基金项目的研究工作，该研究得到国家自然科学基金委员会的资助。

This book is intended for the young student who is interested in graph theory and wishes to study it as part of his mathematical education. Experience at Cambridge shows that none of the currently available texts meet this need. Either they are too specialized for their audience or they lack the depth and development needed to reveal the nature of the subject.本书为英文版。

The guiding principle in this book is to use differential forms as an aid in exploring some of the less digestible aspects of algebraic topology. Accordingly， we move primarily in the realm of smooth manifolds and use the de Rham theory as a prototype of all of cohomology. For applications to homotopy theory we also discuss by way of analogy cohomology with arbitrary coefficients. Although we have in mind an audience with prior exposure to algebraic or differential topology， for the most part a good knowledge of linear algebra， advanced calculus， and point-set topology should suffice. Some acquaintance with manifolds， simplicial complexes， singular homology and cohomology， and homotopy groups is helpful， but not really necessary. Within the text itself we have stated with care the more advanced results that are needed， so that a mathematically mature reader who accepts these background materials on faith should be able to read the entire book with the minimal prerequisites.本书为英文版。

In expositions of the elements of topology it is customary for homology to be given a fundamental role. Since Poincare， who laid the foundations of topology， homology theory has been regarded as the appropriate primary basis for an introduction to the methods of algebraic topology. From homotopy theory， on the other hand， only the fundamental group and covering-space theory have traditionally been included among the basic initial concepts. Essentially all elementary classical textbooks of topology （the best of which is， in the opinion of the present authors， Seifert and Threlfall's A Textbook of Topology） begin with the homology theory of one or another classof complexes. Only at a later stage （and then still from a homological point of view） do fibre-space theory and the general problem of classifying homotopy classes of maps （homotopy theory） come in for consideration. However， methods developed in investigating the topology of differentiable manifolds， and intensively elaborated from the 1930s onwards （by Whitney and others）， now permit a wholesale reorganization of the standard exposition Of the fundamentals of modern topology. In this new approach， which resembles more that of classical analysis， these fundamentals turn out to consist primarily of the elementary theory of smooth manifolds， homotopy theory based on these， and smooth fibre spaces. Furthermore， over the decade of the 1970s it became clear that exactly this complex of topological ideas and methods were proving to be fundamentally applicable in various areas of modern physics.本书为英文版。