基于论文“Real-Time Video Abstraction”的图像抽象化matlab代码，文中的滤波算法是双边滤波，附带图像，可以直接运行

抽象代数，dummit foote Widely acclaimed algebra text. This book is designed to give the reader insight into the power and beauty that accrues from a rich interplay between different areas of mathematics. The book carefully develops the theory of different algebraic structures, beginning from basic definitions to some in-depth results, using numerous examples and exercises to aid the reader's understanding. In this way, readers gain an appreciation for how mathematical structures and their interplay lead to powerful results and insights in a number of different settings.

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A First Course in Abstract Algebra-JB Fraleigh, 7ed(2003).djvu

A First Course in Abstract Algebra introduces groups and commutative rings. Group theory was invented by E. Galois in the early 1800s, when he used groups to completely determine when the roots of polynomials can be found by formulas generalizing the quadratic formula.