tailieunhanh - Lecture note Theory of automata - Lecture 19

The following will be discussed in this chapter: NFA corresponding to closure of FA, examples, memory required to recognize a language, example, distinguishing one string from another, example, theorem, proof. | Lecture note Theory of automata - Lecture 19 Lecture 28 Theory Of Automata By Dr. MM Alam 1 Lecture 27 recap Chomsky Normal Form conversion in JFLAP Push Down Automata Definition PDA Symbols 2 Adding A Pushdown Stack A PUSHDOWN STACK is a place where input letters can be stored until we want to refer to them again. It holds the letters it has been fed in a long line. The operation PUSH adds a new letter to the line. The new letter is placed on top of the STACK and all the other letters are pushed back or down accordingly. Before the machine begins to process an input string the STACK is presumed to be empty which means 3 that every storage location in it initially contains a Adding A Pushdown Stack If the STACK is then fed the letters a b c d by this sequence of instructions PUSH a PUSH b PUSH c PUSH d Then top letter in the STACK is d the second is c the third is b and the fourth is a. If we now execute the instruction PUSH b the letter b will be added to the STACK on the top. The d will be pushed down to 4position 2 Adding A Pushdown Stack One pictorial representation of a STACK with these letters in it is shown below. Beneath the bottom a we presume that the rest of the STACK which like the INPUT TAPE has infinitely many storage locations holds only blanks. b d c b a Δ 5 Adding A Pushdown Stack How the following PDA is working a b 6 Adding A Pushdown Stack Its operation on the input string aaabbb. We begin by assuming that this string has been put on the TAPE. STACK Δ TAPE a a a b b b Δ 7 Adding A Pushdown Stack Its operation on the input string aaabbb. We begin by assuming that this string has been put on the TAPE. STACK a Δ TAPE a a a b b b Δ 8 Adding A Pushdown Stack We now read another a and proceed as before along the a edge to push it into the STACK. Again we are returned to the READ box. STACK Again we read an a our third and again this a is pushed onto the a TAPE a a a b b b Δ a Δ 9 Adding A Pushdown Stack After the third PUSH a we are routed .

• Tự động hoá
• Theory of automata
• Lecture Theory of automata
• Computer theory
• Theory of computation
• Distinguishable strings
• Indistinguishable strings
• Formal Languages & Automata
• Pushdown Automata
• Finite Automata
• Non deterministic Pushdown Automata
• Instantaneous Description
• Language accepted by NPDA
• Deterministic Finite Automata (DFA)
• Operational Manner
• Transition Graphs
• Extended Transition Function
• Automata theory
• Automata theory languages
• Automata theory computation
• Context Free grammars
• Regular languages
• Automata hữu hạn
• Đoán nhận ngôn ngữ
• Biểu diễn automata
• Xây dựng automata
• xây dựng DFA
• Automata Model
• Settlement Development
• Automata Framework
• Cellular Automata
• Transport Equations
• Population Dynamics
• isaster Areas
• Bus Dynamics
• A Hierarchy of Formal Languages and Automata
• ecursively Enumerable Languages
• Recursive Languages
• Unrestricted Grammars
• Context Sensitive Grammars
• Tin học lý thuyết
• Bài giảng Tin học lý thuyết
• Automata đẩy xuống
• Push Down Automata
• PDA đơn định
• PDA không đơn định
• Additional classes
• Intractable problems
• Properties of context free languages
• Introduction to automata theory languages and compution
• Regular expressions
• Properties of regular sets
• chương trình đồ họa
• giáo trình thiết kế
• thiết kế đồ họa
• lý thuyết automata
• tài liệu về automata
• tài liệu về pushdown automata
• ngôn ngữ lập trình
• Logical Computation
• Quantum Computations
• Automata Application
• Organizing Networks
• Molecular Orbitals
• Disordered Cellular automata
• Traffic flow models
• Automata traffic
• Nagel Schreckenberg
• Deceleration terms
• Cellular Automata in transportation
• Evaluating Dynamic
• Three Basic Concepts
• Languages Grammars Automata
• Input file
• Control unit
• String in L
• Introduction Formal Languages & Automata
• A formal language
• An automaton
• Fundamental ideas
• Models underlying computing
• Văn phạm phi ngữ cảnh
• Ngôn ngữ hình thức
• Văn phạm hình thức và các Automata
• Trình biên dịch
• Solution of the task
• Polish notation
• Total language tree
• Null production
• Nullable production
• Theorem regarding CNF
• The START state
• Nondeterministic PDA
• Equivalent PDA
• PDA corresponding to CFG
• STACK alphabet
• Computer science
• CFG corresponding