# PN

PN may refer to:

## Science, technology, and mathematics

### Mathematics

• Path graph of size ${\displaystyle n}$, denoted by ${\displaystyle P_{n}}$
• Petri net, one of several mathematical modeling languages for the description of distributed systems
• Polish notation, a prefix notation proposed by Jan Łukasiewicz
• Polynomial vector spaces, denoted by ${\displaystyle \mathbb {P} _{n}}$
• Pseudorandom number sequence