In this paper we introduce three subsets of the partial order ≤H ≤ ℋ , and study three subclasses of languages defined by these subsets. They are out subword-�...
Let Σ be a finite alphabet and Σ∗ the set of all words over Σ. A subword-free lan- guage (also known as a hypercode) is an independent subset of Σ∗ with�...
19 References � Outfix and Infix Codes and Related Classes of Languages � Outfix-Free Regular Languages and Prime Outfix-Free Decomposition � Continuous Languages.
Aug 21, 2023 � The cut of two languages is a subset of their concatenation given by the leftmost maximal prefix match. We study the state complexity of the cut operation.
We introduce three subsets of the embedding order and study the regular languages defined by these binary relations. Also, we consider the decision problems�...
Jul 30, 2018 � Yes, context-free languages are closed under the substring operator. One way to prove this is to use string homomorphisms.
Missing: Subword- Subclasses.
Oct 1, 2019 � We study the nondeterministic state complexity of basic regular operations on the classes of prefix-, suffix-, factor-, and subword-free,�...
Jul 23, 2020 � Y4 is a comma-free code, as no code word in Y4 is a proper subword ... In this chapter we define and discuss the two subclasses of regular�...
If L is Context Free and Infinite, then there exists pumping length p > 0 such that if string w in L ls length p or longer, then p has nonempty substring vxy�...
Grammars and parsing have a long history in linguistics. Computer science built on the accumulated knowledge when starting to design programming.