PG(3,2)

The notation \( \text{PG}(3, 2) \) refers to a projective geometry known as the projective space of dimension 3 over the finite field \( \mathbb{F}_2 \), which contains 2 elements (0 and 1). In the context of projective geometry, \( \text{PG}(n, q) \) represents a projective space of dimension \( n \) over a finite field of order \( q \).