△ is the capital Greek letter Delta. Common uses in mathematics include:

1. Triangle

2. Discriminant of roots of quadratic functions

p>

3. Represents the increment of a variable, such as △x, △y

4. Represents a small amount

5. Represents the difference

6. Extended information representing the division of an interval in Riemann's definite integral theory

Delta is the pronunciation of the fourth Greek letter, its uppercase is Δ and its lowercase is δ. In mathematics or physics, the capital Δ is used to represent the increment symbol. The lowercase δ is usually used to represent variables or symbols in advanced mathematics.

The delta symbol is widely used in life, and many brands and institutions are named after it. Pronunciation delta /de:lta/ Delta is a measure of one unit change in the futures price, which is the magnitude of the change in premium. For example, if the call option ⊿ is 0.4, it means that for every one yuan change in the futures price, the option price will change by 0.4 yuan.