Introduction
In counter machine models the reader will observe, and may be bewildered by, the plethora of instruction sets defined by their authors. This reference will use the symbolism defined below to provide a standarized presentation format (syntax) to facilitate comparison of the sets and help give them definition.
The base model is derived from Minsky (1967), Lambek (1961) and in particular Shepherdson-Sturgis (1963 p. 225).
Read more about this topic: Counter Machine Reference Model
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