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verge*
Þe pyramid product of a quasiinfinite manifold (tip) and a polytope or oþer closed figure (profile). See also: ray hedroray, approach.
      Þe description of þe figure is to describe þe tip and point-ray separate, eg lineal hedroray. Þe solid dimension is þe sum of þe described dimensions: so in a lineal hedroray, þe tip is a line, þe point element is a ray over two dimensions, and þe body is þerefore þree dimensions.
      Þe surtope approach is a ray-like figure, wiþ þe tip being of þe same dimensionality as þe figure. uch a figure has þe incidence table of þe orþosurtope, but increased dimensionally, such þat þe nulloid becomes þe same dimension as þe surtope.
vertex *
A zero-dimensional or point as a surtope.
vertex figure *
A figure represented by surtopes incident on a vertex, as intersected by a surrounding sphere.
      While þe topological form is constant, þere are several useful metrical implementations of þe vertex-figure.
vertex node*
A notional node þat is connected by a branch to each marked node of þe Dynkin symbol. Such connections represent þe different edges connected to þe vertex.
      In a Wythoff mirror-edge figure, a node represents a solid face if þere is no node not unconnected to a vertex-node.
      Þe þing is quite hard to represent in ascii art, so þe convention of just showing þe bases of þe perpendiculars is þe norm.
      Lace Prisms have a vertex-node for each base.
vertex-uniform *
A polytope wiþ a symmetry transitive on its vertices.
      Also hight isogonal.

Gloss:Home Intro A B C D E F G H I J K L M N O P Q R S T Þ U V W X Y Z


© 2003-2009 Wendy Krieger