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The euclid abstract machine

Mycka, Jerzy; Costa, José Félix; Coelho, Francisco

Concrete non-computable functions are usually related to the halting function. Is it possible to present examples of non-computability, which are unrelated to the halting problem and its derivatives? We built an abstract machine based on the historic concept of compass and ruler constructions (a compass construction would suffice) which reveals the existence of non-computable functions not related with the halt...


The euclid abstract machine: Trisection of the angle and the halting problem

Coelho, Francisco; Costa, José Félix; Mycka, Jerzy

Concrete non-computable functions are usually re- lated to the halting function. Is it possible to present examples of non-computability, which are unrelated to the halting prob- lem and its derivatives? We built an abstract machine based on the historic concept of compass and ruler constructions (a com- pass construction would suffice) which reveals the existence of non-computable functions not related with th...


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