 Real tree

A real tree is a metric space $(T,d)$ in which every pair $a,b\in T$ is joined by a unique arc and that arc is isometric to the real interval $[0,d(a,b)]$. Equivalently, it is a geodesic metric space with no nontrivial simple loops.

"Real tree" can refer to a couple of different concepts depending on the context, but it often pertains to either: 1. **RealTree (Browning)**: A brand that specializes in camouflage patterns and outdoor gear. Founded in the 1980s, RealTree is known for its realistic camouflage designs that are particularly popular among hunters and outdoor enthusiasts. Their patterns often feature natural elements like trees, leaves, and branches, designed to help hunters blend in with their surroundings.