In the theory of computation, a tag system is a deterministic model of computation published by Emil Leon Post in 1943 as a simple form of a Post canonical system. [1]

3 天之前 · A tag system is set of rules that specifies a fixed number of elements (commonly denoted nu or beta) be removed from the beginning of a sequence and a set of elements to be appended ("tagged" onto the end) based on the elements that were removed from the beginning.

2008年1月22日 · This paper aims to contribute to research on limits of solvability and unsolvability for tag systems, taking into account these two parameters. The main result is the reduction of the 3 n + 1-problem to a surprisingly small tag system.

2022年5月20日 · A tag system operates on a string of symbols by reading the symbol from the head of the string, deleting a constant number of symbols from the head of the string, and appending one or more symbols to the tail of the string based on the symbol read from the head.

A tag system consists of a sequence of elements, each colored say black or white. The rules for the system specify that at each step a fixed number of elements should be removed from the beginning of the sequence.

最后更新于： 2024年5月12日. 在互联网行业，想必大家或多或少都听过“用户标签”这个词。作为产品经理，我有幸接触过一些相关系统，在最近一份工作中还有机会亲手从0到1构建了一个（最小可用的）标签系统，本文简单记录下这个过程。

2018年8月30日 · DeMol has given a 3-symbol tag system with deletion number 2 that simulates iterations of the Collatz function. Here we give a simple generalized tag system with only three non-blank instructions and a cyclic tag system with only four instructions both of which simulate iterations of the Collatz function.

A tag system is a restricted kind of Post normal system where productions can only be uniquely selected based on the first symbol of each of their antecedents.

3 天之前 · A tag system in which a list of n tag rules (each of a special form) is applied to a system in sequential order and then starting again from the first rule. In a cyclic tag system, each set of tag rules has the special structure that a pattern is appended if (and only if) the first element of the current pattern is a 1 and that independent of ...

The tag system provides stable references to definitions, lemmas, propositions, theorems, remarks, examples, exercises, situations and even equations, sections and items. As the project grows, each of these gets a tag which will always point to the same mathematical result.