Decidability: Countable Sets (The Halting Problem Revisited)
1. What does “countable” really mean? Think about counting objects: If you can arrange the things in a list like
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Category: Theory of Computation
Understanding the Language ATM — Decidability
What Exactly Is ATM? Imagine you have: The language ATM contains all the pairs ((M, w)) where the answer to
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Understanding the Language ACFG — Decidability
🌿 Decidability — Understanding the Language ACFG (When Does a Context-Free Grammar Produce Any String?) Let’s imagine you’re handed a
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Understanding the Language ANFA — Decidability
🌱 What Exactly Is ANFA? ANFA is not a language made of normal strings.Instead, every element in this language is
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The Language ADFA — Decidability
🌼 What exactly is ADFA? ADFA is a collection of machines—specifically, DFAs. But it includes only those DFAs that accept
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Decidable and Undecidable Languages
🌟 1. Decidable Languages A language is decidable if there exists a machine — usually pictured as a Turing Machine
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The Church–Turing Thesis
🌱 1. Why We Needed This Thesis Before modern computers existed, mathematicians wondered: Two great thinkers worked on this problem
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Turing Machine — Multi-Tape Turing Machines
🌟 What is a Multi-Tape Turing Machine? A multi-tape Turing machine is simply a Turing machine that uses two or
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Turing Machine for Palindromes Using Two Tapes
⭐ Turing Machine for Palindromes Using Two Tapes When we say a string is a palindrome, we simply mean that
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Turing Machine: Accepting Palindromes Using One Tape
🌿 1. Palindrome — A Quick Reminder A string is a palindrome if: For example: 🌿 2. The Challenge for
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