Difference between revisions of "Iff"
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'''Iff''' is an abbreviation for the phrase "if and only if." | '''Iff''' is an abbreviation for the phrase "if and only if." | ||
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+ | In mathematical notation, "iff" is expressed as <math>\iff</math>. | ||
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+ | It is also known as a [[conditional|biconditional]] statement. | ||
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+ | An iff statement <math>p\iff q</math> means <math>p\implies q</math> <b>and</b> <math>q\implies p</math> at the same time. | ||
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+ | ==Examples== | ||
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+ | In order to prove a statement of the form "<math>p</math> iff <math>q</math>," it is necessary to prove two distinct implications: | ||
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+ | * if <math>p</math> then <math>q</math> | ||
+ | * if <math>q</math> then <math>p</math> | ||
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+ | ===Applications=== | ||
+ | [https://artofproblemsolving.com/wiki/index.php/Godel%27s_First_Incompleteness_Theorem Gödel's Incompleteness Theorem] | ||
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+ | ===Videos=== | ||
+ | [https://www.youtube.com/embed/MckXBKafPfw Mathematical Logic] ("I am in process of making a smoother version of this" -themathematicianisin). | ||
+ | |||
+ | ==See Also== | ||
+ | * [[Logic]] | ||
{{stub}} | {{stub}} | ||
[[Category:Definition]] | [[Category:Definition]] |
Latest revision as of 01:13, 24 December 2020
Iff is an abbreviation for the phrase "if and only if."
In mathematical notation, "iff" is expressed as .
It is also known as a biconditional statement.
An iff statement means and at the same time.
Contents
[hide]Examples
In order to prove a statement of the form " iff ," it is necessary to prove two distinct implications:
- if then
- if then
Applications
Gödel's Incompleteness Theorem
Videos
Mathematical Logic ("I am in process of making a smoother version of this" -themathematicianisin).
See Also
This article is a stub. Help us out by expanding it.