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user5721565

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 2 years, 5 months
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  • Last seen Jul 18 '20 at 6:53

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3 $a_k$ is $\{L :\exists M$ a pushdown automaton with bounded stack of size $k$ which accept $L\}$ what is the set $\bigcup_1^\infty a_k$? Sep 26 '18
3 Are the languages $\{w\in \{a,b\}^* : \#_a(w) > \#_b(w) \}$ and $\{w\in \{a,b\}^* : \#_a(w) \neq \#_b(w) \}$ context free? Sep 16 '18
2 $L$ is a context free language so prefix$(L)$ is also context free language Sep 21 '18
2 $L$ is a context free language so prefix$(L)$ is also context free language Sep 29 '18
0 How to define a TM which writes all the tape alphabet, when the number of states is independent of the tape alphabet size? Jul 18 '20
0 How to build a TM which decides $L_k := \{(\langle M \rangle ,x)\in HP : |(\langle M \rangle ,x)| \le k \}$ May 13 '20
0 A condition for $\emptyset \neq S\subset RE$ under which $L_S \notin RE$ Aug 19 '19
0 what are the conditions for two NFAs to be equivalent? Sep 6 '18
0 proving an automaton language for the language over $\{a,b\}^{*}$ : $w\in L$ if $aa$ is not an infix of $w$ ($aa$ doesn't appear in $w$) Aug 8 '18

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