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Nested Stack Automaton
In automata theory, a nested stack automaton is a finite automaton that can make use of a stack containing data which can be additional stacks. Like a stack automaton, a nested stack automaton may step up or down in the stack, and read the current symbol; in addition, it may at any place create a new stack, operate on that one, eventually destroy it, and continue operating on the old stack. This way, stacks can be nested recursively to an arbitrary depth; however, the automaton always operates on the innermost stack only. A nested stack automaton is capable of recognizing an indexed language, and in fact the class of indexed languages is exactly the class of languages accepted by one-way nondeterministic nested stack automata. Nested stack automata should not be confused with embedded pushdown automata An embedded pushdown automaton or EPDA is a computational model for parsing languages generated by tree-adjoining grammars (TAGs). It is similar to the context-free grammar-pars ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Empty String{{!}}ε
Empty may refer to: Music Albums * ''Empty'' (God Lives Underwater album) or the title song, 1995 * ''Empty'' (Nils Frahm album), 2020 * ''Empty'' (Tait album) or the title song, 2001 Songs * "Empty" (The Click Five song), 2007 * "Empty" (Garbage song), 2016 * "Empty", by Bebe Rexha from '' Better Mistakes'', 2021 * "Empty", by Belmont from ''Belmont'', 2018 * "Empty", by Blair St. Clair from '' Identity'', 2020 * "Empty", by Boyinaband featuring Jaiden Animations, 2018 * "Empty", by Cooliecut, Kin$oul, Craig Xen, and Ski Mask the Slump God from '' Members Only, Vol. 4'', 2019 * "Empty", by the Cranberries from '' No Need to Argue'', 1994 * "Empty", by Harry Chapin from '' Heads & Tales'', 1972 * "Empty", by Juice Wrld from '' Death Race for Love'', 2019 * "Empty", by King Gizzard & the Lizard Wizard from '' I'm in Your Mind Fuzz'', 2014 * "Empty", by Metric from '' Live It Out'', 2005 * "Empty", by Neurosis from '' Souls at Zero'', 1992 * "Empty", by Olivia O'B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
