# Who knows if there is a special symbol in mathematics that denotes the difference?

Who knows if there is a special symbol in mathematics that denotes the difference?

- Oh, exactly delta !! !!
- "delta" denotes the difference
- #916; - delta (difference)
- It depends on what kind of difference.

If two objects are different, then the "unequal" sign is an overlapping equality. (It is possible that different symbols denote the same object, then it is equal or identically equal).

If in some other way the difference of objects is measured and this difference can be expressed by a number, then (if several conditions are fulfilled), say that a metric is introduced on the set of objects. You can enter the metric in different ways (many metrics are defined on one set). Often the "distance" in the selected metric is denoted by the letter "ro" of the Greek and the designations of objects are written in parentheses.

If the operations "addition" and inverse "subtraction" are defined on the set and a metric is introduced, then often the difference (distance) is denoted as the modulus of the real numbers xy, sometimes in double sticks, and is called the "norm" (Norm is the distance to the zero element)

On the set of real numbers, the difference often means both the capital Greek delta. A changing difference, for example, the difference between the meju functions (not at the point - there will be a difference in numbers), and "in general" is called "variation" and is often denoted by the Greek delta - small.

Even "sigma" is now a generally accepted sign, but not "legally approved"

In mathematics there are no fixed rules. Even the plus and minus symbols can be used in a completely different sense than "teach in school." Articles and books usually explain the meaning of the signs used. Such an explanation is the requirement of the standard.