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cs.FL2026
Non-Terminal Complexity of Simple Semi-Conditional Grammars
Henning Fernau, Sanjay Jain, Linus Richter +2
We study the complexity of simple semi-conditional grammars (SSCGs) in terms of the number of their terminals and non-terminals. We show that SSCGs with three non-terminals can gen…
math.LO2026
Chains and Antichains inside Many-One Degrees and Variants
Linus Richter, Frank Stephan, Xiaoyan Zhang
The relations between many-one degrees and one-one degrees have been studied since the beginning of recursion theory; early results from the 1960s include that many-one degrees alw…