Preface
The subject of Fukaya categories has a reputation for being hard to approach. This
is due to the amount of background knowledge required (taken from homological
algebra, symplectic geometry, and geometric analysis), and equally to the rather
complicated nature of the basic definitions. The present book is intended as a resource
for graduate students and researchers whowould like to learn about Fukaya categories,
and possibly use them in their own work. I have tried to focus on a rather basic subset
of topics, and to describe these as precisely as I could, filling in gaps found in some of
the early references. This makes for a rather austere style (for that reason, a thorough
study of this book should probably be complemented by reading some of the papers
dealing with applications). A second aim was to give an account of some previously
unpublished results, which connect Fukaya categories to the theory of Lefschetz
fibrations. This becomes predominant in the last sections, where the text gradually
turns into a research monograph.
I have borrowed liberally from the work of many people, first and foremost among
them Fukaya, Kontsevich, and Donaldson. Fukaya’s foundational contribution, of
course, was to introduce A1-structures into symplectic geometry. On the algebraic
side, he pioneered the use of the A1-version of the Yoneda embedding, which we
adopt systematically. Besides that, several geometric ideas, such as the role of Pin
structures, and the construction of A1-homomorphisms in terms of parametrized
moduli spaces, are taken from the work of Fukaya, Oh, Ohta and Ono. Kontsevich
introduced derived categories of A1-categories, and is responsible for much of
their theory, in particular the intrinsic characterization of exact triangles. He also
conjectured the relation between Dehn twist and twist functors, which is one of our
main results. Finally, in joint work with Barannikov, he suggested a construction
of Fukaya categories for Lefschetz fibrations; we use a superficially different, but
presumably equivalent, definition. Donaldson’s influence is equally pervasive. Besides
his groundbreaking work on Lefschetz pencils, he introduced matching cycles,
and proposed them as the starting point for a combinatorial formula for Floer cohomology,
which is indeed partly realized here. Other mathematicians have also made
important contributions. For instance, parts of our presentation of Picard–Lefschetz
theory reflect Auroux’ point of view. A result of Smith, namely that the vanishing
cycles in a four-dimensional Lefschetz pencil necessarily fill out the fibre, was crucial
in suggesting that such cycles might “split-generate” the Fukaya category. Besides
that, work of Fukaya–Smith on cotangent bundles provided a good testing-ground
for some of the more adventurous ideas about Lefschetz fibrations. Our approach
to transversality issues is the result of several conversations with Lazzarini. Finally,
Abouzaid’s suggestions greatly improved the discussion of symplectic embeddings.
由于in general定义Lagrangian Floer theory存在obstruction,因此本书讨论了exact symplectic manifold (with corners) [;M;]中的closed exact Lagrangian。这样做的好处是运用Stokes定理可以看出没有disc bubbling,从而这些Lagrangian submanifold tautologically unobstruc...
评分由于in general定义Lagrangian Floer theory存在obstruction,因此本书讨论了exact symplectic manifold (with corners) [;M;]中的closed exact Lagrangian。这样做的好处是运用Stokes定理可以看出没有disc bubbling,从而这些Lagrangian submanifold tautologically unobstruc...
评分由于in general定义Lagrangian Floer theory存在obstruction,因此本书讨论了exact symplectic manifold (with corners) [;M;]中的closed exact Lagrangian。这样做的好处是运用Stokes定理可以看出没有disc bubbling,从而这些Lagrangian submanifold tautologically unobstruc...
评分由于in general定义Lagrangian Floer theory存在obstruction,因此本书讨论了exact symplectic manifold (with corners) [;M;]中的closed exact Lagrangian。这样做的好处是运用Stokes定理可以看出没有disc bubbling,从而这些Lagrangian submanifold tautologically unobstruc...
评分由于in general定义Lagrangian Floer theory存在obstruction,因此本书讨论了exact symplectic manifold (with corners) [;M;]中的closed exact Lagrangian。这样做的好处是运用Stokes定理可以看出没有disc bubbling,从而这些Lagrangian submanifold tautologically unobstruc...
这本书的封面设计简直是数学界的一股清流,那种沉稳的深蓝色调,配上精致的字体排版,瞬间就让人感受到内容的厚重与严谨。我作为一个常年与代数拓扑和几何打交道的“老兵”,拿到手的时候,首先被它的装帧质量所折服。它不是那种轻飘飘的平装本,而是那种沉甸甸、可以经受住无数次翻阅和咖啡渍考验的硬壳精装,仿佛本身就是一件值得珍藏的艺术品。书脊上的书名虽然晦涩难懂,但笔触的力度和间距的把控,都透露出出版方对内容尊重到了骨子里。我甚至花了足足五分钟,只是对着光线观察纸张的纹理,那种微微泛黄却不失亮度的纸张,保证了长时间阅读眼睛也不会过于疲劳,这点对于钻研这种高深理论的读者来说,简直是福音。这本书的物理存在感非常强,它不仅仅是知识的载体,更像是摆在书架上的一种宣言,昭示着持有者对前沿纯数学的追求与投入。那种拿到“硬货”的满足感,是电子版永远无法比拟的。
评分内容本身的叙事节奏掌握得极其精妙,它像一部结构复杂的交响乐,各个声部互相交织,最终汇集成震撼人心的主旋律。在处理一些需要大量计算和抽象思维的证明段落时,作者并没有采取那种流水账式的线性推演,而是巧妙地运用了“分块”和“提炼要点”的策略。你会发现,即便是最繁复的计算,也被巧妙地嵌入到更宏大的几何背景之中,使得原本枯燥的代数操作,重新获得了其内在的几何意义。有那么几个证明,我反复阅读了不下三遍,每一次都有新的理解涌现。它不是那种读完后合上书本就忘记大部分内容的类型,它更像是一个思维的“模具”,一旦你代入思考,它就会重塑你对相关数学结构的处理方式。这种对思维方式的塑造能力,才是衡量一本数学专著是否伟大的核心标准,而这本书显然达到了这个高度。
评分初翻目录,我的心跳节奏明显加快了。章节的划分逻辑清晰得令人拍案叫绝,它不是简单地堆砌定理和证明,而是构建了一套精密的知识阶梯。前几章奠定的基础语言,如同建筑师在绘制蓝图前对地基的勘测,每一个概念的引入都显得水到渠成,没有丝毫的生硬过渡。特别是它对某些关键构造的几何直觉描述,那种“画龙点睛”式的比喻,让我这个在相关领域徘徊已久的人,瞬间打通了困扰已久的任督二脉。我尤其欣赏作者在引入新工具时,总是会先给出它在宏观理论框架中的位置和作用,而不是直接抛出复杂的公式,这种教学上的克制与智慧,极大地降低了初学者的心理门槛。读着读着,我甚至能想象出作者在课堂上讲解时的神态——自信、清晰,并且带着对数学美感的由衷热爱。这本书的深度与广度兼备,绝非市面上那种只追求时髦术语堆砌的快餐式读物可比拟。
评分这本书在参考文献和脚注的处理上,展现出一种令人尊敬的学术态度。大量的脚注不仅仅是简单的引用来源,它们更像是作者留给读者的“秘密通道”——一些深入探讨、历史背景,甚至是与主流观点不同的声音,都被精心地放置在页脚。这使得你在阅读主体内容时可以保持沉浸,但一旦对某个细节产生了好奇心,页脚立刻提供了向下探索的无限可能。我常常会忍不住跳到脚注中去寻找灵感,发现那些隐藏在“小字”里的信息,往往比正文的某些部分还要引人入胜,它们为书中的理论增添了丰富的历史和文化维度。这种尊重读者的求知欲,提供多层次阅读体验的做法,在当今追求效率的学术出版中显得尤为可贵。它鼓励的不是被动接受,而是主动发掘。
评分对于这本书的最终感受,可以用“醍醐灌顶”来形容。它不是那种轻松愉快地读完就能掌握的读物,它要求投入时间、专注力和心智的彻底开放。然而,当那些曾经模糊的数学图像在脑海中变得清晰、坚实起来时,那种成就感是无与伦比的。这本书成功地搭建了一座通往更深层次数学世界的坚固桥梁,它不仅传授了知识,更重要的是,它传授了一种研究和思考复杂数学问题的**方法论**。我确信,无论将来我的研究方向如何演变,这本书中蕴含的深刻洞察和严谨精神,都将成为我工具箱中不可或缺的利器。它不只是一个知识的集合,它是一次智力上的马拉松,而跑完全程的读者,必将获得丰厚的回报。
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