Property talk:P8866

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has operator
mathematical operator associated with this algebraic structure

Represents	operator (Q131030)
Data type	Item
Domain	algebraic structure (Q205464)
Example	additive group (Q4681347) → addition (Q32043) symmetric group (Q849512) → function composition (Q244761) matrix ring (Q2915729) → matrix addition (Q2264115) matrix multiplication (Q1049914)
Lists	Items with the most statements of this property Count of items by number of statements (chart) Items with the most statements Items with the fewest statements Count of items by number of sitelinks (chart) Items with the most sitelinks Items with the most sitelinks, but no link to one Wikipedia (sample: Welsh Wikipedia, cywiki) Items with the fewest sitelinks Most linked wikis Items with the most identifier properties By value of property Most statements Fewest statements Most sitelinks Most linked wikis Total of sitelinks on items Most identifiers Fewest identifiers Items with no other statements Most recently created items Items with novalue claims Items with unknown value claims Usage history (total) Usage history (main statement) Database reports/Constraint violations/P8866 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 18 Main statement 14 77.8% of uses Qualifier 4 22.2% of uses
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[create Create a translatable help page (preferably in English) for this property to be included here]

Type “algebraic structure (Q205464)”: item must contain property “instance of (P31), subclass of (P279)” with classes “algebraic structure (Q205464)” or their subclasses (defined using subclass of (P279)). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P8866#Type Q205464, SPARQL

Value type “operator (Q131030), operation (Q3884033)”: This property should use items as value that contain property “instance of (P31), subclass of (P279)”. On these, the value for instance of (P31), subclass of (P279) should be an item that uses subclass of (P279) with value operator (Q131030), operation (Q3884033) (or a subclass thereof). (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P8866#Value type Q131030, Q3884033, SPARQL

Scope is as main value (Q54828448): the property must be used by specified way only (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P8866#Scope, SPARQL

Allowed entity types are Wikibase item (Q29934200): the property may only be used on a certain entity type (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303).
List of violations of this constraint: Database reports/Constraint violations/P8866#Entity types