tailieunhanh - Lecture note Theory of automata - Lecture 13

The main contents of this chapter include all of the following: Examples of Kleene’s theorem part III (method 1) continued, Kleene’s theorem part III (method 2: Concatenation of FAs), example of Kleene’s theorem part III (method 2: Concatenation of FAs). | Lecture # 22 Theory Of Automata By Dr. MM Alam 1 1 Lecture#21 at a glance JFLAP for Pumping Lemma Version II Practical Demonstrations Context Free Grammar For earliest computers . Every procedure, no matter how complicated, had to be spelled out in the crudest set of instructions: They accepted no instructions except those in their own machine language. It could take dozens of these primitive instructions to do anything useful. It could take quite a few to evaluate one complicated arithmetic expression. 3 Context Free Grammar For example to calculate This clearly required that some "higher-level" language be invented-a language in which one mathematical step, such as evaluating the formula above, could be converted into one single computer instruction. 4 Context Free Grammar A super program called the compiler does the conversion from a high-level language into assembler language code. It cannot just look at the expression and understand it. Rules must be given by which this string . | Lecture # 22 Theory Of Automata By Dr. MM Alam 1 1 Lecture#21 at a glance JFLAP for Pumping Lemma Version II Practical Demonstrations Context Free Grammar For earliest computers . Every procedure, no matter how complicated, had to be spelled out in the crudest set of instructions: They accepted no instructions except those in their own machine language. It could take dozens of these primitive instructions to do anything useful. It could take quite a few to evaluate one complicated arithmetic expression. 3 Context Free Grammar For example to calculate This clearly required that some "higher-level" language be invented-a language in which one mathematical step, such as evaluating the formula above, could be converted into one single computer instruction. 4 Context Free Grammar A super program called the compiler does the conversion from a high-level language into assembler language code. It cannot just look at the expression and understand it. Rules must be given by which this string can be processed. 5 Context Free Grammar Also we want our machine to be able to reject strings of symbols that make no sense as arithmetic expressions. Like "((9)+". This input string should not take us to a final state in the machine. However, we cannot know that this is a bad input string until we have reached the last letter. 6 Context Free Grammar If the + were changed to a ), the formula would be valid. An FA that translated expressions into instructions as it scanned left to right would already be turning out code before it realized that the whole expression is nonsense. 7 Context Free Grammar Rules for valid arithmetic expressions. Rule 1 Any number is in the set AE. Rule 2 If x and y are in AE then so are: -(x) (x + y) (x - y) (x*y) (x/y) (x**y) For example, the input string ((3 + 4) * (6 + 7)) 8 Context Free Grammar The way this can be produced from the rules is by the sequence 3 is in AE 4 is in AE (3 + 4) is in AE 6 is in AE 7 is in AE (6 + 7) is in AE ((3 + 4) * (6 + 7)) is

• Tự động hoá
• Theory of automata
• Lecture Theory of automata
• Computer theory
• Theory of computation
• Kleene’s theorem part III
• Concatenation of FAs
• 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