43 lines
1.3 KiB
Markdown
43 lines
1.3 KiB
Markdown
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---
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title: Normal Form
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TARGET DECK: Obsidian::STEM
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FILE TAGS: logic
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tags:
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- logic
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---
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## Overview
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An object is said to be in **normal form** if it cannot be reduced any further. Examples of normal form include:
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* [[equiv-trans#Normal Forms|Conjunctive Normal Form]]
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* [[equiv-trans#Normal Forms|Disjunctive Normal Form]]
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* [[quantification#Identifiers|Prenex Normal Form]]
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%%ANKI
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Basic
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What does it mean for an object to be in normal form?
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Back: It cannot be rewritten/reduced any further.
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Reference: Gries, David. *The Science of Programming*. Texts and Monographs in Computer Science. New York: Springer-Verlag, 1981.
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<!--ID: 1707675146194-->
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END%%
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%%ANKI
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Basic
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What zero-order logical normal form(s) have only $\land$ and $\lor$ operators?
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Back: CNF and DNF
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Reference: Gries, David. *The Science of Programming*. Texts and Monographs in Computer Science. New York: Springer-Verlag, 1981.
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<!--ID: 1707675369145-->
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END%%
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%%ANKI
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Basic
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What first-order logical normal form(s) writes bound identifiers before free ones?
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Back: PNF
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Reference: Gries, David. *The Science of Programming*. Texts and Monographs in Computer Science. New York: Springer-Verlag, 1981.
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<!--ID: 1707675369187-->
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END%%
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## References
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* Gries, David. *The Science of Programming*. Texts and Monographs in Computer Science. New York: Springer-Verlag, 1981.
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