Problems of "pushdown" and "pullback" on a commutative ring
交换环上“降”问题和“上升”问题
Problems of "pushdown" and "pullback" on a commutative ring
交换环上“降”问题和“上升”问题
A relationship between the accepting powers of sub logarithmic space bounded two way alternating pushdown automata with and without 1 inkdot is investigated.
对具有1个墨水和没有墨水对数空限定交推自动机之关系进行研究。
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