How do you define infinity?

infinity, the concept of something that is unlimited, endless, without bound. The common symbol for infinity, ∞, was invented by the English mathematician John Wallis in 1655.

Is infinity an abstract?

New theories may therefore be needed to describe this location, which seems to transcend what is possible in the physical world. For now, infinity remains in the realm of the abstract.

Is infinity and not defined same?

What is the difference between Infinity and Undefined? Undefined means, it is impossible to solve. Infinity means, it is without bound.

Can you add or subtract infinity?

It is impossible for infinity subtracted from infinity to be equal to one and zero. Therefore, infinity subtracted from infinity is undefined.

Can an entity be associated with more than one entity?

Many to Many: One entity from X can be associated with more than one entity from Y and vice versa. For example, Students as a group are associated with multiple faculty members, and faculty members can be associated with multiple students. How to Create an Entity Relationship Diagram (ERD)

What is the difference between an entity instance and entity class?

An entity instance is the occurrence of a particular entity. An entity instance of an entity class is the representation of a particular entity and is described by the values of the attributes of the entity. An identifier of an entity instance is one or more attributes that name or identify entity instances.

What is the difference between an identifier and an entity?

An identifier serves the same role for a table that a key does for an entity. Entities can be associated with one another in relationships. The degree of a relationship is the number of entity classes in the relationship. A binary relationship is a relationship between two or more entities.

What is the difference between id-dependent and nonidentifying entities?

E-R models use an identifying relationship to connect entities that are ID-dependent. An ID-dependent entity is an entity whose identifier includes the identifier of another entity. ID-dependent entities are associated by a nonidentifying relationship.