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- 2022年4月7日 (四) 11:46 Zhang3 讨论 贡献创建了页面Algebra (创建页面,内容为“= Algebra = 1. Defining Sets One of the most fundamental concepts in Algebra is the concept of a set. This video introduces the concept of a set and various methods for defining sets. 2. Set Equality and Subsets Sets can be related to each other in different ways. This chapter describes the set relations of equality, subset, superset, proper subset, and proper superset. 3. Venn Diagrams, Unions, and Intersections Venn diagrams are an important tool allowi…”)