مشروع البحث: دراسة حول بعض خواص المثاليات الداخلية الضبابية الحدسية في نصف الزمر ة- Γ
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المساهمين
الممولين
رقم التعريف
4849
الباحث
سوسن مصطفي علي عثمان
الوصف
This chapter is devoted to the concepts that we need in the following chapters. The materials in this chapter are taken from the following references: [2], [3], [5], [6], [7], [9], [10], [16], [17], [18], [19], [20], [22], [23], [26], [27], [28],[29], [30], [33], [34], [35], [36], [37], [38].
1.1 Relations:
Some describe or define mathematics as the study of relations. Since a relation is a set of ordered pairs, we get our first glimpse of the fundamental importance of the concept of an ordered pair.
Definition 1.1.1:
If A and B are any non-empty sets, then the product (or Cartesian product ) A × B is defined by:
𝐴×𝐵={(𝑎,𝑏):𝑎∈𝐴,𝑏∈𝐵}.
Definition 1.1.2:
A binary relation or simply a relation R from a set A into a set B is a subset of A × B, and we write that 𝑎𝑅𝑏 or (𝑎,𝑏)∈𝑅 .
الكلمات الدالة
خواص المثاليات الداخلية