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A '''singleton''' is an [[array]] with [[bound]] 1. Equivalently, its [[shape]] consists entirely of 1s. It may have any [[rank]]. For example, all the following are singletons: | A '''singleton''' is an [[Array model|array]] with [[bound]] 1. Equivalently, its [[shape]] consists entirely of 1s. It may have any [[rank]]. For example, all the following are singletons: | ||
* The [[scalar]] <source lang=apl inline>42</source> | * The [[scalar]] <source lang=apl inline>42</source> | ||
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Singletons may be subject to [[singleton extension]]. | Singletons may be subject to [[singleton extension]]. | ||
{{APL features}} | {{APL features}}[[Category:Kinds of array]] |