| Øystein Ore | EK67S7BH1V | topic | open | Wikipedia List of mathematicians born in the 19th century#QZZK |
| Øystein Ore | VSQJ1K2WKK | topic | open | Wikipedia List of people by Erdős number#ROV3, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#4B94, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#9ADR, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#I278, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#ZQUO |
| Øystein Ore | YF33AZGBJ7 | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q329846, nLab Øystein Ore, ProofWiki Mathematician:Øystein_Ore, Wikipedia Øystein Ore |
| Āryabhaṭa's sine table | JSREQYPX52 | definition | open | Wikipedia Āryabhaṭa's sine table, Wikidata Q8079604 |
| Āryabhaṭīya | NMZ4XZ08JQ | unknown | out_of_scope (a book, not an item of mathematics) | Wikidata Q3518429, ProofWiki Book:Aryabhata_the_Elder/Aryabhatiya |
| Čech cohomology | 53M0DAN46B | definition | open | Wikipedia Glossary of algebraic topology#WUKW |
| Čech cohomology | 610E6YJC6Y | topic | open | Wikidata Q1095535, EoM Čech_cohomology, nLab Čech cohomology, Wikipedia Čech cohomology |
| Čech complex | AY6NZWPW33 | definition | open | Wikipedia Čech complex, Wikidata Q55638301 |
| Čech nerve theorem | 4B98TPJZY7 | statement | open | Wikipedia Nerve complex#619P |
| Čech-to-derived functor spectral sequence | EZ0PMYKC2H | definition | open | Wikipedia Čech-to-derived functor spectral sequence, Wikidata Q8079690 |
| Černý conjecture | SQNA81E563 | statement | open | Wikipedia Avraham Trahtman#JQ92 |
| Černý conjecture | ZK1MS2N8SX | conjecture | open | Wikipedia List of unsolved problems in computer science#RA0H |
| Đuro Kurepa | 5JMZV30GKB | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#2BOO, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#91AQ |
| Đuro Kurepa | XE6VSA2HQF | topic | open | Wikipedia Đuro Kurepa, Wikidata Q1288394 |
| Łojasiewicz inequality | 32N7V805F4 | statement | open | Wikipedia Łojasiewicz inequality, Wikidata Q8080668 |
| Łojasiewicz inequality | 6FCVXS3EH7 | statement | open | Wikipedia List of inequalities#4CF0 |
| Łoś' theorem | 6RHFXSV5ZV | definition | open | Wikipedia List of theorems#KSXA |
| Łoś's theorem | P8VTJ3K5WD | statement | open | Wikipedia Ultraproduct#GMAP |
| Łoś–Tarski preservation theorem | CJH3H24YQP | statement | open | Wikipedia List of things named after Alfred Tarski#H7Z7 |
| Łoś–Tarski preservation theorem | N4V0XRTGZ3 | statement | open | Wikipedia Łoś–Tarski preservation theorem, Wikidata Q8080822 |
| Łoś–Vaught test | 7AD3441YKR | definition | open | Wikipedia Łoś–Vaught test, Wikidata Q25303635 |
| Łukasiewicz logic | 5M57GJBWTQ | definition | open | Wikipedia Łukasiewicz logic, Wikidata Q8080919 |
| Łukasiewicz-Tarski logic | C4Y934SSAM | definition | open | Wikipedia List of things named after Alfred Tarski#BISS |
| Łukasiewicz–Moisil algebra | 974DTJDF6P | definition | open | Wikipedia Łukasiewicz–Moisil algebra, Wikidata Q18385859 |
| Ōno's lexical law | 8C6R5QEANE | statement | open | Wikipedia Ōno's lexical law, Wikidata Q8081649 |
| Ōno's lexical law (original version) | RMA00P89YV | statement | open | Wikipedia Ōno's lexical law#2HNQ |
| Śaṅkaranārāyaṇa | E0KT6BKZPS | unknown | open | Wikipedia List of Indian mathematicians#0L2U |
| Śleszyński–Pringsheim criterion | NQ68T92AY1 | statement | open | Wikipedia Convergence problem#0WVX |
| Śleszyński–Pringsheim theorem | T8CFZK0WBR | statement | open | Wikipedia List of theorems#EXWL |
| Śleszyński–Pringsheim theorem | ZAXJ2PHX80 | statement | open | mathlib_1000 Q8081891, Wikidata Q8081891, thousand_plus Q8081891, Wikipedia Śleszyński–Pringsheim theorem |
| Śrīpati | WKGZ570NQZ | unknown | open | Wikipedia List of Indian mathematicians#DC3J |
| Śārṅgadeva | F6C3ZA429W | unknown | open | Wikipedia List of Indian mathematicians#SNWB |
| Şaban Karataş | TQGBNKCMPH | topic | open | Wikipedia Şaban Karataş, Wikidata Q17432310 |
| Šidák correction | SVWTYNYS87 | definition | open | Wikipedia Šidák correction, Wikidata Q17143690 |
| Šidák correction for t-test | EHWN7QX68F | definition | open | Wikipedia Šidák correction for t-test, Wikidata Q25303964 |
| Štefan Znám | 87QJ1V1Q1G | unknown | open | Wikipedia List of people by Erdős number#I8GT |
| Švarc-Milnor lemma | Z10M48RBKS | statement | open | Wikipedia List of theorems#MA1K |
| Švarc–Milnor lemma | 89XHYAT5V3 | statement | open | Wikipedia Švarc–Milnor lemma, Wikidata Q11085263 |
| Žiberna, Aleš | A4N9MFMBAM | topic | open | Wikipedia List of statisticians#NMLP |
| Ștefan Emilian | ZKHM1HWXYH | topic | open | Wikipedia Ștefan Emilian, Wikidata Q12744293 |
| α | ZGHVZCJ29F | definition | open | Wikipedia Glossary of set theory#GK9U |
| α-closed, α-open | 1P21FH9QQW | definition | open | Wikipedia Glossary of general topology#QC7R |
| Α/α | 5CJ90WB07W | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q9887, ProofWiki Symbols:Greek/Alpha |
| ΑΒΒ | ST50HTHEJP | definition | open | Wikipedia ΑΒΒ, Wikidata Q25304458 |
| β | JRXHJE9PW3 | definition | open | Wikipedia Glossary of set theory#DC4E |
| β-open | XXFQ21XG11 | definition | open | Wikipedia Glossary of general topology#GG4M |
| γ | BQY41V190A | definition | open | Wikipedia Glossary of set theory#A2MB |
| Γ | F2R46HDT5G | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q14387, ProofWiki Symbols:Greek/Gamma |
| Γ | PRYCX74TSV | definition | open | Wikipedia Glossary of set theory#GQS6 |
| Γ-convergence | N9PQBVBYPP | definition | open | Wikipedia Γ-convergence, Wikidata Q278549 |
| Γ-space | K9WJ9Q5DG4 | definition | open | Wikipedia Γ-space, Wikidata Q30589879 |
| Γ-space | VB57TGRKVD | definition | open | Wikipedia Glossary of algebraic topology#OSEE |
| γ–θ conjecture | Z6GMNTEFT1 | definition | open | Wikipedia List of unsolved problems in mathematics#BY1X |
| δ | 1M9DRRJ02S | definition | open | Wikipedia Glossary of set theory#5LVT |
| Δ | ZDVGM02QAN | definition | open | Wikipedia Glossary of set theory#72D7 |
| δ-cluster point, δ-closed, δ-open | PJ6JA8ZX19 | definition | open | Wikipedia Glossary of general topology#1VKO |
| Δ1-formulas and concepts | HS2R8BC9J7 | statement | open | Wikipedia Lévy hierarchy#19PP |
| Δ2-formulas and concepts | 5FH5E9A4JX | statement | open | Wikipedia Lévy hierarchy#LOML |
| Δ3-formulas and concepts | PC9PK0T0Y6 | statement | open | Wikipedia Lévy hierarchy#8063 |
| ΔP | REAQF73YWM | definition | open | Wikipedia ΔP, Wikidata Q8083978 |
| ε | W9GATGZABF | definition | open | Wikipedia Glossary of set theory#SWY3 |
| Ε-net | H6HBBA41TB | definition | open | Wikipedia Ε-net, Wikidata Q8083985 |
| Ε-net | P1769TES4N | definition | open | Wikipedia Ε-net (computational geometry), Wikidata Q8083987 |
| Ε-quadratic form | X4QAEWZ057 | definition | open | Wikipedia Ε-quadratic form, Wikidata Q8083981 |
| Ε-topology | J5836V0B2D | unknown | open | Wikipedia Topologies on spaces of linear maps#GT5M |
| Ζ | TDYHEFZG6A | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q14394, ProofWiki Symbols:Greek/Zeta |
| ζ | VAJF7WS161 | definition | open | Wikipedia Glossary of invariant theory#77FD |
| η | 1HC1ADHJMN | definition | open | Wikipedia Glossary of set theory#QOTL |
| Η | HCX826JZGZ | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q14396, ProofWiki Symbols:Greek/Eta |
| Η set | KE7XR398M9 | definition | open | Wikipedia Η set, Wikidata Q18385909 |
| η-extendible | JC6TZD828V | definition | open | Wikipedia List of large cardinal properties#WHE5 |
| Θ | 63ATC66HPV | definition | open | Wikipedia Glossary of set theory#13T7 |
| θ | E1APEZ5076 | definition | open | Wikipedia Glossary of set theory#7FJZ |
| Θ (set theory) | XW118MK1R9 | definition | open | Wikipedia List of mathematical logic topics#8WYQ |
| θ-cluster point, θ-closed, θ-open | Y21VYEY34H | definition | open | Wikipedia Glossary of general topology#P768 |
| Θ/θ | 52ASYB7X4C | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q14398, ProofWiki Symbols:Greek/Theta |
| Θ10 | ZDKA0CWD0H | definition | open | Wikipedia Θ10, Wikidata Q8083982 |
| κ | 53XB9341N4 | definition | open | Wikipedia Glossary of set theory#KJPI |
| κ-categorical | 2DP591QF7Y | definition | open | Wikipedia List of first-order theories#CDJ7 |
| λ | 4N5FGBQKV5 | definition | open | Wikipedia Glossary of set theory#X7W7 |
| Λ | DNCZC0Y7X3 | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q10897, ProofWiki Symbols:Greek/Lambda |
| λ-calculus | CM5207AP79 | definition | open | Wikipedia List of undecidable problems#872A |
| Λ-ring | SR16HZ1ZDG | definition | open | Wikipedia Λ-ring, Wikidata Q8083988 |
| λ-strong | QD5AK4W3YC | definition | open | Wikipedia List of large cardinal properties#LP9E |
| λ-unfoldable | SNM1PSC9MY | definition | open | Wikipedia List of large cardinal properties#A0CP |
| ΛΠ-calculus | G1E897TYP1 | unknown | open | Wikipedia Dependent type#R19U |
| μ | Q8CKPXXESR | definition | open | Wikipedia Glossary of set theory#GB4C |
| μ operator | S8VB28974P | definition | open | Wikidata Q307772, MathWorld Mu-Operator, Wikipedia Mu operator |
| μ-recursive function | TK0R173WKE | definition | open | Wikidata Q284164, EoM Recursive_function, MathWorld RecursiveFunction, nLab recursive function, Wikipedia General recursive function |
| Μ/μ | 9YPJGVDJBK | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q9902, ProofWiki Symbols:Greek/Mu |
| Ξ function | R2PXSAD73Z | definition | open | Wikipedia Ξ function, Wikidata Q8083993 |
| Ξ/ξ | FYYH4M1DK4 | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q14406, ProofWiki Symbols:Greek/Xi |
| Ο/ο | 18YA32SXZR | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q14408, ProofWiki Symbols:Greek/Omicron |
| Π | 3XPVKNRKZP | definition | open | Wikipedia Glossary of set theory#9HNM |
| π | Q037JJCCVJ | definition | open | Wikipedia List of long mathematical proofs#L8EL |
| π-base | BNY039MFGG | definition | open | Wikipedia Glossary of general topology#K6OX |
| Π-calculus | QREGEXZR7F | definition | open | Wikipedia Π-calculus, Wikidata Q602886 |
| Π01 class | ZKVDMTPE7Y | definition | open | Wikipedia Π01 class, Wikidata Q8083994 |
| Π1-formulas and concepts | DVD5ZB11V8 | statement | open | Wikipedia Lévy hierarchy#MM68 |
| Π2-formulas and concepts | JZGREDEDSY | statement | open | Wikipedia Lévy hierarchy#5YDQ |