uni_notes/10 Courses/02 - SoSe 2026/Automatentheorie und formale Sprachen/29593929 - Alphabets.md

created, course, topic, related, type, status, tags

created	course	topic	related	type	status	tags
2026-04-08 10:09	29593850 - Automationtheory	alphabets, characters		lecture	🟢	university

📌 Summary

[!abstract] Definition and examples of alphabets.

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📝 Content

Alphabets are formal, non-empty, finite, sets of characters (or letters or symbols). They are denoted by Sigma.

Sigma = {a, b}

Alphabet Sigma contains the characters a and b.

Sigma = {a, ..., z, A, ..., Z, 0, ..., 9}

usual alphabet for writing text