∏ What is this symbol called?

∏ stands for "product".

1, usage:

For example, "i= 1" can be written below the symbol, and "n" can be written above it, which means that I in the following quadrature formula is added to n from 1.

That is, (1+d1/p1) (1+d2/p2) ... (1+dn/pn).

2. Greek letters:

① ∏ is the Greek letter, that is, the capitalized form of π, which mathematically means quadrature operation or direct product operation, and is similar to σ in form.

② Lowercase: π

In mathematics, pi is often mentioned. Pi, generally expressed by π, is a common mathematical constant in mathematics and physics. It is defined as the ratio of the circumference to the diameter of a circle. It is also equal to the ratio of the area of a circle to the square of its radius.

Accurate calculation of geometric shapes such as circle perimeter, circle area and sphere volume is the key value. In the analysis, π can be strictly defined as the smallest positive real number x satisfying sin(x) = 0.

Constant pi ≈3. 14 Preliminary calculation of Zu Chongzhi (China) 3. 14 15926

3. radian: π= 180 degrees?

4, commonly used Greek alphabet symbols:

Extended data:

Commonly used mathematical symbols:

1、∫?

indefinite integral

2、∮

Closed surface integral

3、 ∝?

infinitely small

4、∞?