| 31. | Arithmetics are pointed unary systems, whose unary operation is injective successor, and with distinguished element 0.
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| 32. | Also, please do NOT add unary : it is covered under the NON-STANDARD positional systems!
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| 33. | Also for unary operations like " or x 2 the number is entered first then the operator.
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| 34. | However the complement laws give the fundamental properties of the somewhat inverse-like unary operation of set complementation.
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| 35. | For example, a circuit might contain unary NOT gates, or be entirely described by binary NAND gates.
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| 36. | However, if membership in a language is undecidable, then membership in its unary version is also undecidable.
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| 37. | The unary system is only useful for small numbers, although it plays an important role in theoretical computer science.
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| 38. | In order to obtain interesting notion ( s ), the unary operation must somehow interact with the semigroup operation.
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| 39. | Theoretically it would even be possible ( but not necessarily practical ) to define parenthesization as a unary bifix operation.
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| 40. | :The primitive recursive functions of one argument ( i . e ., unary functions ) can be computably enumerated.
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