Definition:Hyperbola/Vertex

Parts of Hyperbola

 

Consider a hyperbola $K$ whose foci are $F_1$ and $F_2$.

Each of the points where $K$ intersects the major axis of $K$ is known as a vertex of $K$.

In the above diagram, $V_1$ and $V_2$ are the vertices of $K$.

Also see

• Definition:Covertex of Hyperbola

Linguistic Note

The plural of vertex is vertices.

The word vertex is Latin for peak, from which the irregular plural form.

Sources

• 1933: D.M.Y. Sommerville: Analytical Conics (3rd ed.) ... (previous) ... (next): Chapter $\text {V}$. The Hyperbola: $2$.
• 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): hyperbola
• 2014: Christopher Clapham and James Nicholson: The Concise Oxford Dictionary of Mathematics (5th ed.) ... (previous) ... (next): vertex