Next, we define the angle Θ

|Θ(⨀Xᵢ)| = sin⁻¹_e_^{-R(⨀Xᵢ)} (5)

I

and the norm

|X| = κ(2π_e_)⁻¹ᐟ² _e_^{(HX)}. (6)

Now, if[19] a statistically independent basis; _i.e._, one for which

κ

R(⨀Xᵢ) ≡ constant, (7)

I

can be provided in terms of one-dimensional components; _i.e._, none

of them can be decomposed further, then it is just the usual problem

of diagonalization of a symmetric matrix by means of a congruence

transformation to provide an orthogonal coordinate system. Furthermore,

for uniqueness, we arrange the spectrum in decreasing order. Then,

by means of the Radon Nikodym theorem applied to each of these

one-dimensional axes, the probability distribution may be made; _e.g._,

Gaussian, if desired. Thus, we obtain the promised orthogonal Euclidean

space.

[19] This “if” is the catch that makes all methods of metrization of a

space of dimensionality higher than one impractical, except the method

of successive projections upon unit spheres centered at the center of

gravity. The method of using that nilpotent projection operator is

described in the companion paper(see footnote page 65).

Self-Organizing Systems, 1963 · 第 80 / 92 题