To delete vertices on a polygon mesh, use
.Many types of polygon vertices cannot be deleted using the Delete key. For example, you can use this key to delete border vertices on the exterior of a mesh where the selected vertex is connected to only two edges, but you cannot use the Delete key to delete a vertex that is connected to more than two edges.
When an interior vertex is deleted using Delete Edge/Vertex, any edges associated with the deleted vertices are also removed. The polygon faces surrounding the deleted vertex are replaced with a single n-sided polygon created from the vertices surrounding the deleted vertex. Maya does not use quads and triangles in the affected area in order to reduce the number of polygons. This action is equivalent to selecting all the edges surrounding the vertex and deleting them.
To delete vertices
To delete interior vertices