Changes

===Note 14===

===Note 14===

Table&nbsp;5 sums up the facts of the physical situation at equilibrium.  If we let <math>\mathbf{B} = \{ \mathrm{note}, \mathrm{rest} \} = \{ \mathrm{moving}, \mathrm{steady} \} = \{ \mathrm{charged}, \mathrm{resting} \},</math> or whatever candidates you pick for the 2-membered set in question, the Table shows a function <math>f : \mathbf{B} \times \mathbf{B} \to \mathbf{B}</math>, where <math>f(x, y) = (x, y).\!</math>

Table&nbsp;5 sums up the facts of the physical situation at equilibrium.  If we let <math>\mathbf{B} = \{ \mathrm{note}, \mathrm{rest} \} = \{ \mathrm{moving}, \mathrm{steady} \} = \{ \mathrm{charged}, \mathrm{resting} \},</math> or whatever candidates you pick for the 2-membered set in question, the Table shows a function <math>f : \mathbf{B} \times \mathbf{B} \to \mathbf{B},</math> where <math>f(x, y) = (x, y) = \operatorname{XOR}(x, y).\!</math>

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