Basic idea to show that the class of regular languages are closed under merging / modified shuffle
107975
Show that the class of regular languages is closed under shuffle
35868
Elementary properties of closure
158728
Using induction for an easy proof for formal languages
115597
Almost universal class
128482
The set of subsequential limits is closed
32910
Completion and algebraic closure commutable
102170
Showing a Sequence and its Limit are Closed
748
What do 'lazy' and 'greedy' mean in the context of regular expressions?
5448
Finding the closure of some subsets of the ordered square
128844
An empty intersection of decreasing sequence of closed sets
109229
An Example of a Nested Decreasing Sequence of Bounded Closed Sets with Empty Intersection
127591
How to prove that the collection of rank-k matrices forms a closed subset of the space of matrices?
102490
Does this recursive sequence have a closed-form?
101719
Finding the n-th lexicographic permutation of a string
68951
Normalization of the overlap $\langle x'|p'\rangle$
47544
A mathematically mature introduction to Turing Machines and Computability [reference-request]
62175
A general formula for $n$ distinguishable arrangements of length $\ell$ of a sequence of a given size?