👉 In mathematics, "notions" are abstract concepts or objects that are not directly representable in traditional linear algebra. These can be thought of as abstract mathematical entities that have properties but do not have a representation in terms of scalars and vectors. For example, in linear algebra, the notion of a vector space is used to define how one can add, subtract, multiply, and divide elements of a vector space together. Similarly, in abstract algebra, the concept of an ideal is used to define
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