thanks !!!The "capital pi" symbol is the multiplicative analogue of the sigma operator. That is to say:
\(\displaystyle \sum\limits_{k = 1}^{n} k = 1 + 2 + 3 + \cdots + n = \frac{n(n+1)}{2}\)
But:
\(\displaystyle \prod \limits_{k=1}^{n} k = 1 \times 2 \times 3 \times \cdots \times n = n!\)
Using the classical Greek alphabet the capital \(\displaystyle \Pi\) corresponds to the English P.Can anyone tell me what this symbol is? is this PI? 3.14?? thanks in advance