On 7/19/2019 9:00 AM, John Clark wrote:
Turing Machinesare in a more fundamental category than the other two. All Van Neumann Machines and GPUsare Turing Machinesbut not all Turing Machinesare Van Neumann Machinesor GPUs.
They are only Turing Machine if you define "Turing Machines" by what functions that can be computed, i.e. the extensional definition that is abstracted away from the procedure of computing. In terms of the procedure of computing, the procedure defined by Alan Turing is different from that of von Neumann computers and GPUs.
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