| Karl Weierstrass | 9YHTARJNHA | topic | open | Wikipedia List of eponyms of special functions#FMOH |
| Karl Weierstrass | R10G08Y4NA | topic | open | Wikipedia List of real analysis topics#RDP7, Wikipedia List of mathematicians born in the 19th century#L042 |
| Karl Weierstrass | TVEHJX7G2Z | topic | open | Wikipedia List of complex analysis topics#2VBZ, Wikipedia List of German mathematicians#RP9O |
| Karl Weierstraß | XX1GCV17FW | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q57103, nLab Karl Weierstraß, ProofWiki Mathematician:Karl_Theodor_Wilhelm_Weierstrass, Wikipedia Karl Weierstrass |
| Karl Wilhelm Feuerbach | HEEZW5RF6A | topic | open | Wikipedia List of geometers#SA6K |
| Karl Wilhelm Feuerbach | QJZHJBCAV6 | topic | open | Wikipedia Karl Wilhelm Feuerbach, Wikidata Q70884 |
| Karl Zsigmondy | Q1NEXSRE5T | topic | open | Wikipedia Karl Zsigmondy, Wikidata Q4191776 |
| Karl-Heinz Boseck | B4X2PVNXFV | topic | open | Wikipedia Karl-Heinz Boseck, Wikidata Q4090238 |
| Karl-Heinz Boseck | W54WV48R8B | topic | open | Wikipedia List of German mathematicians#Q7D0 |
| Karl-Rudolf Koch | 78YE3K4T3Y | unknown | open | Wikipedia List of German mathematicians#S2SF |
| Karl-Theodor Sturm | C7J12HP3A2 | topic | open | Wikipedia Karl-Theodor Sturm, Wikidata Q6371500 |
| Karl-Theodor Sturm | G9404MYNHX | topic | open | Wikipedia List of German mathematicians#X81E |
| Karlis Zalts | 2AXCPP1F95 | topic | open | Wikipedia Karlis Zalts, Wikidata Q37634065 |
| Karlsruhe metric | D95V2VAWZA | definition | open | Wikipedia Karlsruhe metric, Wikidata Q6372598 |
| Karma Dajani | CB3B79DS3W | topic | open | Wikipedia List of people by Erdős number#HXI0 |
| Karma Dajani | SFBM845JBE | topic | open | Wikipedia Karma Dajani, Wikidata Q86929839 |
| Karma Police | DGN9BGP1FG | definition | open | Wikipedia Karma Police (surveillance programme), Wikidata Q21190730 |
| Karmarkar's algorithm | P35AR3Y0TP | definition | open | Wikipedia Karmarkar's algorithm, Wikidata Q2246305 |
| Karn's algorithm | MVMZ99Q2J3 | unknown | open | Wikipedia List of algorithms#ZNQ3 |
| Karnaugh diagram | B2MDCPJX5R | definition | open | Wikipedia List of graphical methods#T97X |
| Karnaugh map | 2GMAHPH43K | definition | open | Wikidata Q461528, EoM Karnaugh_map, MathWorld KarnaughMap, Wikipedia Karnaugh map |
| Karnaugh map | 9XT9RP6TSK | definition | open | Wikipedia List of Boolean algebra topics#DRVA |
| Karol Borsuk | 8G7EFC31VW | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q469088, nLab Karol Borsuk |
| Karol Borsuk | WKZW2RM5WP | unknown | open | Wikipedia List of people by Erdős number#T1IY, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#NT33, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#VNDC, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#YHI0 |
| Karol J. Krótki | B6B35JBJ8Q | unknown | open | Wikipedia List of fellows of the American Statistical Association#UD5F |
| Karol Józef Krótki | 73PYDBX3NP | unknown | open | Wikipedia List of fellows of the American Statistical Association#NVN9 |
| Karol Kozlowski | H7H0E1AA1P | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#5LOD |
| Karola Mészáros | J0H3N4F8PK | topic | open | Wikipedia Karola Mészáros, Wikidata Q102362892 |
| Karoline Pershell | 9Y0K1ET2YS | topic | open | Wikipedia Karoline Pershell, Wikidata Q102384227 |
| Karoubi conjecture | FNG6HTQ9R0 | statement | open | Wikipedia Karoubi conjecture, Wikidata Q6373272 |
| Karoubi envelope | AQ4R12WE26 | definition | open | Wikidata Q3055409, nLab Karoubi envelope, Wikipedia Karoubi envelope |
| Karp Prize | 51HRX4JYS5 | unknown | open | Wikipedia Association for Symbolic Logic#P7PG |
| Karp's 21 NP-complete problems | 8N1QNWES30 | problem | open | Wikipedia Karp's 21 NP-complete problems, Wikidata Q1734364 |
| Karpelevi\v{c}, in Ito form | 9XABS6VVQR | statement | record (an item of a paper that no node asks for yet. The record keeps its edges in the record plane (corpus arxiv AX8.6)) | arXiv 2609.26058#DMUS |
| Karpenko--Merkurjev | MG790FREE6 | statement | record (an item of a paper that no node asks for yet. The record keeps its edges in the record plane (corpus arxiv AX8.6)) | arXiv 2610.07508#28NL |
| Karplus-Strong string synthesis | DA59V3S6KF | unknown | open | Wikipedia List of algorithms#V6GF |
| Karp–Lipton theorem | 64A3JWWF72 | statement | open | Wikipedia List of theorems#RR7C |
| Karp–Lipton theorem | YX8PQRRSQ0 | statement | open | mathlib_1000 Q6373327, Wikidata Q6373327, thousand_plus Q6373327, Wikipedia Karp–Lipton theorem |
| Karsten Grove | 84EFX1WVXP | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#Z3NU |
| Karsten Grove | S22J2Y1ZTX | topic | open | Wikipedia Karsten Grove, Wikidata Q15067163 |
| Karsten Nohl | F3VVHH68RM | topic | open | Wikipedia Karsten Nohl, Wikidata Q104627 |
| Karush–Kuhn–Tucker conditions | 453GA3M14M | definition | open | Wikipedia Karush–Kuhn–Tucker conditions, Wikidata Q2075125 |
| Karush–Kuhn–Tucker conditions | AS56QJ2P9P | definition | open | Wikipedia List of numerical analysis topics#DGI9 |
| Kary Myers | EWF6DS1E6N | topic | open | Wikipedia List of fellows of the American Statistical Association#JJIJ |
| Kary Myers | XR74JJCAPN | topic | open | Wikipedia Kary Myers, Wikidata Q79914878 |
| Karyn Moffat | V6HBRKDDFC | unknown | open | Wikipedia List of people by Erdős number#77PR |
| Kasch ring | 44TZB2XY55 | definition | open | Wikipedia Kasch ring, Wikidata Q6374084 |
| Kashiwara's lemma | 69Y1AKJYH0 | statement | record (an item of a paper that no node asks for yet. The record keeps its edges in the record plane (corpus arxiv AX8.6)) | arXiv 2610.20466#XPK3 |
| Kasiski examination | 6H18PAZ98A | definition | open | Wikipedia Kasiski examination, Wikidata Q1546264 |
| Kasner metric | 6KK80RNQ96 | definition | open | Wikipedia Kasner metric, Wikidata Q3333767 |
| Kasper Green Larsen | CEJSKBJ36P | unknown | open | Wikipedia List of people by Erdős number#9BQP |
| Kasper Peeters | PWX2PM450C | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q62066525, nLab Kasper Peeters |
| Kasso Okoudjou | W81PX21230 | topic | open | Wikipedia Kasso Okoudjou, Wikidata Q16946732 |
| KASUMI | 67TEKVGH86 | definition | open | Wikipedia KASUMI, Wikidata Q1718415 |
| KATAANTJE4 | KATAANTJE4 | statement | record (an item of a paper that no node asks for yet. The record keeps its edges in the record plane (corpus arxiv AX8.6)) | arXiv 2205.06433#20SI |
| Katalin Bimbó | 2Q0RBP1F3A | unknown | open | Wikipedia List of people by Erdős number#2F8W |
| Katalin Bimbó | YQ2VD7G87N | unknown | open | Wikipedia List of women logicians#FFKP |
| Katalin Hangos | CS6PJS81X3 | unknown | open | Wikipedia List of people by Erdős number#FRYR |
| Katalin Marton | HRC1A2VS8P | topic | open | Wikipedia Katalin Marton, Wikidata Q15823185 |
| Katalin Marton | SBQBBVKM8C | topic | open | Wikipedia List of people by Erdős number#7CI6 |
| Katalin Vesztergombi | 7DFN6AA6VB | topic | open | Wikipedia List of people by Erdős number#FH6F |
| Katalin Vesztergombi | G47SSJ3033 | topic | open | Wikipedia Katalin Vesztergombi, Wikidata Q48379103 |
| Katarzyna Rejzner | MVHPV2P0GW | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q62066729, nLab Katarzyna Rejzner, Wikipedia Kasia Rejzner |
| Kate Calder | 82VZA5JM06 | topic | open | Wikipedia List of fellows of the American Statistical Association#6GU5 |
| Kate Calder | 90GKFAKMZR | topic | open | Wikipedia Kate Calder, Wikidata Q25999495 |
| Kate Claghorn | GZPZXDH4BF | unknown | open | Wikipedia List of fellows of the American Statistical Association#MR54 |
| Kate Okikiolu | 7R9HES8BDD | topic | open | Wikipedia Kate Okikiolu, Wikidata Q15994553 |
| Kate Tilling | TJZE76X70P | topic | open | Wikipedia Kate Tilling, Wikidata Q21402741 |
| Katerina Kechris | W2SWVEAQH3 | unknown | open | Wikipedia List of fellows of the American Statistical Association#9NWN |
| Katerina Pisetsky | 5NZGZQ835Z | unknown | open | Wikipedia List of Ukrainian Jews#22VJ |
| KaTeX | 9MPP7R5N4A | unknown | open | Wikipedia List of open-source software for mathematics#GIUJ |
| KATFNSJES1 | KATFNSJES1 | statement | record (an item of a paper that no node asks for yet. The record keeps its edges in the record plane (corpus arxiv AX8.6)) | arXiv 2609.37897#2QF2 |
| Katharina T. Huber | F4HEE86GXJ | topic | open | Wikipedia Katharina T. Huber, Wikidata Q102180231 |
| Katharine Abraham | W984HZFF1S | unknown | open | Wikipedia List of fellows of the American Statistical Association#FWNL |
| Katharine Ott | C0K7SZ2WBJ | topic | open | Wikipedia Katharine Ott, Wikidata Q102368291 |
| Katharine Tait | 1RST0DX750 | unknown | open | Wikipedia Bertrand Russell#UX6C |
| Katherine E. Stange | R8NV95C925 | topic | open | Wikipedia Katherine E. Stange, Wikidata Q102111960 |
| Katherine Halvorsen | 1QRE6HP46E | topic | open | Wikipedia Katherine Halvorsen, Wikidata Q102300239 |
| Katherine Halvorsen | RZQ8N60K5B | topic | open | Wikipedia List of fellows of the American Statistical Association#2KYH |
| Katherine Heinrich | 13YW9WZ6AV | topic | open | Wikipedia List of people by Erdős number#FBS8 |
| Katherine Heinrich | VPAQ8P0PEG | topic | open | Wikipedia Katherine Heinrich, Wikidata Q48240899 |
| Katherine J. Thompson | PJS78H7757 | topic | open | Wikipedia Katherine J. Thompson, Wikidata Q70438626 |
| Katherine J. Thompson | TZHN21DGZ6 | topic | open | Wikipedia List of fellows of the American Statistical Association#XLJ6 |
| Katherine Monti | 7GDETFVR9N | unknown | open | Wikipedia List of fellows of the American Statistical Association#3872 |
| Katherine Puckett Layton | EQ9MP92RHJ | topic | open | Wikipedia Katherine Puckett Layton, Wikidata Q61819796 |
| Katherine St. John | 9EGY54TJK5 | unknown | open | Wikipedia List of people by Erdős number#EAII |
| Katherine Wallman | 41CACHCEXB | topic | open | Wikipedia List of fellows of the American Statistical Association#CT8W |
| Katherine Wallman | V2EN4M4K5N | topic | open | Wikipedia Katherine Wallman, Wikidata Q16886413 |
| Kathi Irvine | DRFVCJAWD1 | topic | open | Wikipedia List of fellows of the American Statistical Association#FGON |
| Kathi Irvine | GJFHN3F157 | topic | open | Wikipedia Kathi Irvine, Wikidata Q89488473 |
| Kathleen Gates | 9G5NSS23BP | topic | open | Wikipedia Kathleen Gates, Wikidata Q28966988 |
| Kathleen Lamborn | 3JXDJAZA40 | topic | open | Wikipedia Kathleen Lamborn, Wikidata Q44134666 |
| Kathleen Lamborn | G4EBPA3QSD | topic | open | Wikipedia List of fellows of the American Statistical Association#DC2F |
| Kathleen Madden | C3N1YX92XG | topic | open | Wikipedia Kathleen Madden, Wikidata Q54271907 |
| Kathleen Madden | Q89SRJSVAS | topic | open | Wikipedia List of people by Erdős number#PHK5 |
| Kathleen Ollerenshaw | QG8KT57DDF | topic | open | Wikipedia Kathleen Ollerenshaw, Wikidata Q467786 |
| Kathrin Bringmann | BY311V7EAR | topic | open | Wikipedia Kathrin Bringmann, Wikidata Q106616 |
| Kathrin Klamroth | XQF4FA8464 | topic | open | Wikipedia Kathrin Klamroth, Wikidata Q95777201 |
| Kathryn Chaloner | KPZC1ECA7R | topic | open | Wikipedia Kathryn Chaloner, Wikidata Q18518772 |
| Kathryn Chaloner | QAKNG4YWHA | topic | open | Wikipedia List of fellows of the American Statistical Association#H20Y |