# Symbol doubt

Sir,

In the Picture.,

• Whats the meaning of that symbol (in the red box).?

• What is the name of that symbol?

• Explanation about the working way of that symbol?

• Any websites(if any) suggest for more Detailed Information about that symbol?

Note by Vamsi Krishna Appili
6 years, 4 months ago

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A simple example: for all positive integers $k$, $k!=1\cdot 2\cdot 3\cdot \ldots\cdot (k-1)\cdot k = \prod_{i=1}^k i.$

- 6 years, 4 months ago

As $\sum$ means addition, $\prod$ means product.

- 6 years, 4 months ago

Product symbol

- 6 years, 4 months ago

we call it pie...it stands for continous product....

- 6 years, 4 months ago

it is pie , it means cyclical multiplication , just multiply cyclicaly!

- 6 years, 4 months ago

ρ whatis standing for ut?

- 6 years, 4 months ago

pardon???

- 6 years, 4 months ago

I think means what does $\rho$ stand for.

- 6 years, 4 months ago