Yoneda lemma

in category theory, a theorem that embeds a locally small category into a category of functors
rdfs:label
"Yoneda lemma"@en
skos:altLabel
"Yoneda embedding"@en
schema:description
"in category theory, a theorem that embeds a locally small category into a category of functors"@en
schema:dateModified "2026-10-12T20:22:46+00:00"^^xsd:dateTime
schema:version 2556331988
wikibase:identifiers 5
wikibase:sitelinks 17
wikibase:statements 14
p:P138 wd:statement/Q320577-0ac1966d-4294-c34e-7cd3-11377f54e169
p:P227 wd:statement/Q320577-7940D93E-29D4-443A-A648-494FA1402138
p:P2534 wd:statement/Q320577-324c3616-4b7b-ea54-247d-269395dd7e90
p:P2579 wd:statement/Q320577-049D46EF-A0BE-434A-8183-2BAD1DD5A630
p:P31 wd:statement/Q320577-8609c90b-49d2-53f8-8592-ee2b66455ea8
p:P4215 wd:statement/Q320577-6f60db66-4925-b848-7103-20535e5257a5
p:P5555 wd:statement/Q320577-0516db52-459f-46bc-4179-0b8b098c6e12
p:P6104 wd:statement/Q320577-36D767CC-2AE2-4246-87F6-EF61B4D30609
p:P6366 wd:statement/Q320577-19906AB5-A982-4BF5-A798-C269C554E3AF
p:P646 wd:statement/Q320577-C810E581-1ADD-4093-B7FE-41C2A45860B7
p:P6781 wd:statement/Q320577-00baffad-4340-aa49-82af-c693de7e2568
p:P7235 wd:statement/Q320577-64525ac6-4116-6b94-a09e-4bd72035d00a
wd:statement/Q320577-6c24c0c6-40e7-4897-786e-43bb56144b41
wd:statement/Q320577-92852acd-4ca0-a08f-5ede-2f2122d97871
p:direct-normalized/P227 <https://d-nb.info/gnd/1350766518>
p:direct-normalized/P6366 <https://makg.org/entity/2780771819>
wdt:P138 Nobuo Yoneda
wdt:P227 "1350766518"
wdt:P2534 "<math class="mwe-math-element mwe-math-element-inline" xmlns="http://www.w3.org/1998/Math/MathML"><mrow data-mjx-texclass="ORD"><mstyle displaystyle="true" scriptlevel="0"><mrow data-mjx-texclass="ORD"><mtable columnalign="right left right left right left right left right left right left" columnspacing="0em 2em 0em 2em 0em 2em 0em 2em 0em 2em 0em" displaystyle="true" rowspacing="3pt"><mtr><mtd><msub><mi>hom</mi><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mi data-mjx-texclass="OP" mathvariant="normal">PSh</mi><mo>&#x2061;</mo><mo stretchy="false">(</mo><mi>C</mi><mo stretchy="false">)</mo></mrow></mrow></msub><mo stretchy="false">(</mo><msub><mi>hom</mi><mrow data-mjx-texclass="ORD"><mi>C</mi></mrow></msub><mo stretchy="false">(</mo><mo stretchy="false">&#x2212;</mo><mo>,</mo><mi>c</mi><mo stretchy="false">)</mo><mo>,</mo><mi>X</mi><mo stretchy="false">)</mo></mtd><mtd><mo stretchy="false">&#x2245;</mo><mi>X</mi><mo stretchy="false">(</mo><mi>c</mi><mo stretchy="false">)</mo></mtd><mtd><mo stretchy="false">(</mo><mi>X</mi></mtd><mtd><mo stretchy="false">&#x2208;</mo><mi data-mjx-texclass="OP" mathvariant="normal">PSh</mi><mo>&#x2061;</mo><mo stretchy="false">(</mo><mi>C</mi><mo stretchy="false">)</mo><mo stretchy="false">)</mo></mtd></mtr><mtr><mtd><msub><mi>hom</mi><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mi data-mjx-texclass="OP" mathvariant="normal">PSh</mi><mo>&#x2061;</mo><mo stretchy="false">(</mo><msup><mi>C</mi><mrow data-mjx-texclass="ORD"><mi data-mjx-texclass="OP" mathvariant="normal">op</mi></mrow></msup><mo stretchy="false">)</mo></mrow></mrow></msub><mo stretchy="false">(</mo><msub><mi>hom</mi><mrow data-mjx-texclass="ORD"><mi>C</mi></mrow></msub><mo stretchy="false">(</mo><mi>c</mi><mo>,</mo><mo stretchy="false">&#x2212;</mo><mo stretchy="false">)</mo><mo>,</mo><mi>X</mi><mo stretchy="false">)</mo></mtd><mtd><mo stretchy="false">&#x2245;</mo><mi>X</mi><mo stretchy="false">(</mo><mi>c</mi><mo stretchy="false">)</mo></mtd><mtd><mo stretchy="false">(</mo><mi>X</mi></mtd><mtd><mo stretchy="false">&#x2208;</mo><mi data-mjx-texclass="OP" mathvariant="normal">PSh</mi><mo>&#x2061;</mo><mo stretchy="false">(</mo><msup><mi>C</mi><mrow data-mjx-texclass="ORD"><mi data-mjx-texclass="OP" mathvariant="normal">op</mi></mrow></msup><mo stretchy="false">)</mo><mo stretchy="false">)</mo></mtd></mtr></mtable></mrow></mstyle></mrow></math>"^^http://www.w3.org/1998/Math/MathML
wdt:P2579 category theory
wdt:P31 theorem
wdt:P4215 "Yoneda lemma"
wdt:P5555 <http://commons.wikimedia.org/wiki/Special:FilePath/Yoneda%20lemma%20cd.svg>
wdt:P6104 WikiProject Mathematics
wdt:P6366 "2780771819"
wdt:P646 "/m/088bx"
wdt:P6781 "Yoneda_Lemma"
wdt:P7235 "<math class="mwe-math-element mwe-math-element-inline" xmlns="http://www.w3.org/1998/Math/MathML"><mrow data-mjx-texclass="ORD"><mstyle displaystyle="true" scriptlevel="0"><mi data-mjx-texclass="OP" mathvariant="normal">PSh</mi><mo>&#x2061;</mo><mo stretchy="false">(</mo><mi>C</mi><mo stretchy="false">)</mo></mstyle></mrow></math>"^^http://www.w3.org/1998/Math/MathML
"<math class="mwe-math-element mwe-math-element-inline" xmlns="http://www.w3.org/1998/Math/MathML"><mrow data-mjx-texclass="ORD"><mstyle displaystyle="true" scriptlevel="0"><mi>C</mi></mstyle></mrow></math>"^^http://www.w3.org/1998/Math/MathML
"<math class="mwe-math-element mwe-math-element-inline" xmlns="http://www.w3.org/1998/Math/MathML"><mrow data-mjx-texclass="ORD"><mstyle displaystyle="true" scriptlevel="0"><msub><mi>hom</mi><mrow data-mjx-texclass="ORD"><mrow data-mjx-texclass="ORD"><mi data-mjx-texclass="OP" mathvariant="normal">Psh</mi><mo>&#x2061;</mo><mo stretchy="false">(</mo><mi>C</mi><mo stretchy="false">)</mo></mrow></mrow></msub></mstyle></mrow></math>"^^http://www.w3.org/1998/Math/MathML
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