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A Calculus of Number Based on Spatial Forms - University of ...

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14<br />

8 , 1 Given<br />

, <str<strong>on</strong>g>Number</str<strong>on</strong>g> Rewrite<br />

+ Subtracti<strong>on</strong> Replacement<br />

Additi<strong>on</strong> Rewrite<br />

> = ><br />

> = ><br />

> = ><br />

=<br />

=<br />

7 <str<strong>on</strong>g>Number</str<strong>on</strong>g> Rewrite<br />

Though this system is limited to the integers, Kauman has dened another<br />

boundary as the opposite <str<strong>on</strong>g>of</str<strong>on</strong>g> the magnitude boundary, such that () = : = : A:<br />

The string rewrite rules for this system are quite extensive due to the many permutati<strong>on</strong>s<br />

<str<strong>on</strong>g>of</str<strong>on</strong>g> the characters and are not included here.<br />

Alternatively, the extended Kauman numbers can be dened spatially with three<br />

rules. The deniti<strong>on</strong> below uses his delimiter form <str<strong>on</strong>g>of</str<strong>on</strong>g> the inverse rather than the<br />

overbar form shown above [24].<br />

Double AA = : <br />

Inverse A[A] =<br />

:<br />

Half () = : = : A<br />

Kauman numbers represent the integers and the system computes basic arithmetic<br />

operati<strong>on</strong>s except divisi<strong>on</strong> and powers. Additi<strong>on</strong> by collecti<strong>on</strong> is immediate, as<br />

is multiplicati<strong>on</strong> by substituti<strong>on</strong>. Reducti<strong>on</strong> is d<strong>on</strong>e locally by string rewrite rules.<br />

2.3 Bricken <str<strong>on</strong>g>Number</str<strong>on</strong>g>s<br />

Kauman's work was given a dierent twist by William Bricken, who interpreted his<br />

basic forms as networks [5]. The network form provides singular references and a clear<br />

representati<strong>on</strong> <str<strong>on</strong>g>of</str<strong>on</strong>g> the structures being manipulated. Of particular benet, singular<br />

reference allows multiplicati<strong>on</strong> by stacking, providing an algebraic form. Bricken<br />

numbers are summarized in Table 2.3.<br />

Bricken numbers are networks whose value is determined by their c<strong>on</strong>nectivity.<br />

The network includes a c<strong>on</strong>text and ground, shown as lines above and below the

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