About tiny vibrating strings:

It is thought that the Universe is made up of tiny vibrating strings, smaller than the smallest subatomic particles. Strings are one-dimensional extended entities in physics. In string theory strings are primitive objects and cannot be made of anything. Strings propagate through space and interact with each other.

Wikipedia notes, in physics, a string is a physical entity postulated in string theory and related topics.

Since, a string is a hypothesized physical entity, and so it is actually a suggestion or assumption of its existence as an argument, discussion and a basic principle from which further concepts are developed.

#string #strings 

Abstraction of space and dimension

Space is an infinite three-dimensional extent, where objects and events contain relative position and direction.

Dimension is an extension of the abstract concept of mathematics. For example, a line is one-dimensional, a plane is two-dimensional and space is three-dimensional.

Therefore, space is not an entity but an abstract concept.

Reference: Explanation

#space #dimension #extent #events #abstraction