Question

Plz Tell Me What Is The Name Of This Symbol In Maths​

Answer 1

symmetry

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Answer 2

Answer:

The symbol is one of a letter of Greek Alphabets.

This symbol is called as:

Phi - Φ

In the set theory (class 11th &12th), this symbol relates to such a set which is null or void or is empty.

E.g. If Set 'S'=Φ or S={ }

Then, the total number of elements of the set 'S' (i.e., the cardinal number) is zero.