Π

Π englanniksi

1. (wikipedia) Product over a set of like terms:

\prod_{n=1}^4 n^2 = 1^2 \cdot 2^2 \cdot 3^2 \cdot 4^2 = 576

2. A class (in some hierarchy of formulae, like the hierarchy or hierarchy) of those formulae whose outermost quantifiers are quantifiers.

3. The letter pi ((l)), the 16th letter of the ancient alphabet.

4. The uppercase letter pi (πι), the 16th letter of the modern alphabet|Greek alphabet.