Orthogonal group:O(2,3)

This is a disambiguation page.

You might be referring to:

• Dihedral group:D8. This is the orthogonal group of degree two over field:F3 of type $-1$. It is also the one that corresponding to the standard dot product. It is denoted $O(-1,2,3)$ or $\Omega (-1,2,3)$.
• Klein four-group: This is the split orthogonal group of degree two over field:F3. It is denoted $O(+1,2,3)$ or $\Omega (+1,2,3)$.