Tiêu đề Notes_Logical Diagrams_Logical Diagrams.pdf ✅

www.thinkiit.in Page 1 thinkIIT LOGICAL DIAGRAM  An object is called a subset of another object, if former is a part of latter and such relation is shown by two concentric circles. Chair Bringal Pencil Fig.1 Stationary Vegetable Furniture (i) Pencil, Stationary (ii) Brinjal, Vagetable (iii) Chair, Furniture It is very clear from the above relationship that one object is a part of other, and hence all such relationships can be represented by fig.1.  An object is said to have an intersection with another object, when two objects share some thing in common. uneducated Indian Surgeon Males Politician Educated Fig.2 (i) Surgeon, Males (ii) Politicians, Indian (iii) Educated, Unemployed All the three relationships given above have something in common as some surgeons can be male and some female, some politicians may be Indian and some may belong to other countries, educated may be employed and unemployed as well. And all the three relationships can e represented by fig. 2.  Two objects are said to be disjoint when neither one is subset of anothr nor they share anything in common. In other words, totally unrelated objects fall under this types of relationship. Tool Copy Furniture Cloth Shirt Car Fig. 3 (i) Furniture, Car (ii) Copy, Cloth (iii) Tool, Shirt It is clear from the above relationship that both the objects are unrelated to each other, and hence can be represented diagramatically as shown in fig. 3 From the above discussion we observe that representation of relationship of two objects is not typical if students follow the above points. But representation of three objects diagramatically pose slight problem before the students. A variety of such relationship is being discussed in the following examples.