SPX meaning in Computing ?

Answer:

What is Simplex mean?

In geometry, a simplex (plural: simplexes or simplices) is a generalization of the notion of a triangle or tetrahedron to arbitrary dimensions. The simplex is so-named because it represents the simplest possible polytope in any given space.

For example,

a 0-simplex is a point,a 1-simplex is a line segment,a 2-simplex is a triangle,a 3-simplex is a tetrahedron,a 4-simplex is a 5-cell.

Specifically, a k-simplex is a k-dimensional polytope which is the convex hull of its k + 1 vertices. More formally, suppose the k + 1 points u 0 , … , u k ∈ R k {\displaystyle u_{0},\dots ,u_{k}\in \mathbb {R} ^{k}} are affinely independent, which means u 1 − u 0 , … , u k − u 0 {\displaystyle u_{1}-u_{0},\dots ,u_{k}-u_{0}} are linearly independent.Then, the simplex determined by them is the set of points

C = { θ 0 u 0 + ⋯ + θ k u k | ∑ i = 0 k θ i = 1 and θ i reference

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