Property talk:P2812

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MathWorld ID
identifier for entries in MathWorld, online mathematics reference work

Represents	MathWorld (Q719112)
Applicable "stated in" value	MathWorld (Q719112)
Data type	External identifier
Template parameter	en:Template:MathWorld: |id=, |urlname= - Template:MathWorld (Q6272939)
Allowed values	([\w]+/)?[-\d\w]+
Example	gigantic prime (Q9300316) → GiganticPrime Poincaré conjecture (Q203586) → PoincareConjecture de Longchamps point (Q1807042) → deLongchampsPoint aleph null (Q1445491) → Aleph-0 theory of computation (Q844718) → topics/TheoryofComputation
Source	https://mathworld.wolfram.com/
Formatter URL	https://mathworld.wolfram.com/$1.html
Tracking: same	no label (Q32085184)
Tracking: differences	no label (Q27492336)
Tracking: usage	Category:Pages using Wikidata property P2812 (Q31967492)
Tracking: local yes, WD no	no label (Q27492349)
See also	Brilliant Wiki ID (P6564), Encyclopedia of Mathematics article ID (P7554)
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 Items with no other external identifier 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) Chart by item creation date Mix'n'match (Report) Database reports/Constraint violations/P2812 Map Random list
Proposal discussion	Proposal discussion
Current uses	Total 6,746 Main statement 6,657 out of 15,347 (43% complete) 98.7% of uses Qualifier 5 <0.1% of uses Reference 84 1.2% of uses
Search for values

[create Create a translatable help page (preferably in English) for this property to be included here]

Single best value: this property generally contains a single value. If there are several, one would have preferred rank (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: imaginary number (Q9165172), Klein four-group (Q550593), system of equations (Q735660), nabla operator (Q334508), decreasing function (Q3075231), increasing function (Q3075182)
List of violations of this constraint: Database reports/Constraint violations/P2812#single best value, SPARQL

Distinct values: this property likely contains a value that is different from all other items. (Help)

Exceptions are possible as rare values may exist. Exceptions can be specified using exception to constraint (P2303). Known exceptions: butterfly curve (Q2465157), butterfly curve (Q2533777), bipolar coordinates (Q2383591), two-center bipolar coordinates (Q4087586)
List of violations of this constraint: Database reports/Constraint violations/P2812#Unique value, SPARQL (every item), SPARQL (by value)

Format “([\w]+/)?[-\d\w]+”: value must be formatted using this pattern (PCRE syntax). (Help)

List of violations of this constraint: Database reports/Constraint violations/P2812#Format, hourly updated report, SPARQL

Scope is as main value (Q54828448), as reference (Q54828450): the property must be used by specified way only (Help)

List of violations of this constraint: Database reports/Constraint violations/P2812#Scope, hourly updated report, 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/P2812#Entity types

Label required in languages: en: Entities using this property should have labels in one of the following languages: en (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/P2812#Label in 'en' language, search, SPARQL

Description required in languages: en: Entities using this property should have descriptions in one of the following languages: en (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/P2812#Description in 'en' language, search, SPARQL

This property is being used by: it:Template:MathWorld de:Vorlage:MathWorld he:תבנית:MathWorld, he:תבנית:MathWorld/תיעוד ca:Plantilla:Infotaula de polítop, ca:Plantilla:Infotaula polítop ga:Teimpléad:WD Bosca Sonraí Polytope es:Plantilla:Ficha de politopo v:de:Vorlage:MathWorld Please notify projects that use this property before big changes (renaming, deletion, merge with another property, etc.)