In the last 60 years, the use of the notion of category has led to a remarkable unification and simplification of mathematics. Conceptual Mathematics, Second Edition, introduces the concept of ’category’ for the learning, development, and use of mathematics, to both beginning students and general readers, and to practicing mathematical scientists. The treatment does not presuppose knowledge of specific fields, but rather develops, from basic definitions, such elementary categories as discrete dynamical systems and directed graphs; the fundamental ideas are then illuminated by examples in these categories.

Algebraic topology is a basic part of modern mathematics and some knowledge of this area is indispensable for any advanced work relating to geometry, including topology itself, differential geometry, algebraic geometry and Lie groups. This book provides a treatment of algebraic topology both for teachers of the subject and for advanced graduate students in mathematics either specializing in this area or continuing on to other fields. J. Peter May's approach reflects the enormous internal developments within algebraic topology, most of which are largely unknown to mathematicians in other fields. But he also retains the classical presentations of various topics where appropriate. Most chapters end with problems that further explore and refine the concepts presented. The final four chapters provide sketches of substantial areas of algebraic topology and the book concludes with a list of suggested readings for those interested in delving further into the field.

本书旨在个案讲论中国文学批评范畴的诸多特点，从范畴的质性构成，范畴语词与思想的来源，到范畴的耦合方式和孤行通用规律，各有侧重地界定了传统名言的一般特性。

《范畴论》作者在书中使用的是现代范畴论通用的概念和术语，但是在对一些基本概念和理论的处理过程中，作者尝试使用比较简洁直接的方法，避免烦琐的论述。《范畴论》的前3章是范畴论的基础内容，适合高年级本科生和研究生的教学以及科研人员对范畴论基础知识的需要，第4章可供从事代数拓扑学尤其是同调代数研究的研究生和科研人员学习和参考，第5章既可以为从事代数几何的科研人员参考，同时也可为希望进一步学习Topos理论的读者提供层论方面的预备知识。