| Operon | DAMDJ7Z6S2 | unknown | open | Wikipedia List of genetic algorithm applications#1YYM |
| opetope | NQBPS0YPN1 | object | open | Wikidata Q48970630, nLab opetope, Wikipedia Opetope |
| OPI is harder than one-bit LLR | GD9VBKTGEV | 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 2610.12357#M1D1 |
| Opial | 3MT76BFME5 | 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 2610.11440#3NQ0 |
| Opial property | M7M45HS8M4 | definition | open | Wikipedia Opial property, Wikidata Q7098122 |
| Opial's Lemma | HT0TM463K6 | 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 2609.29552#RC9X |
| Opial's Lemma | MD8F0KBVH4 | 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 2609.27974#LGRH |
| Opial's Lemma in , Lemma 2.47 | TEKBECA0JA | 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 2610.02963#WHDS |
| Opinion | XFZDKNBZ1Q | definition | open | Wikipedia Opinion, Wikidata Q3962655 |
| Opinion poll | 28HYTXGQ17 | definition | open | Wikipedia Opinion poll, Wikidata Q49958 |
| Opinion poll | A4BWXZ7RDW | definition | open | Wikipedia List of statistics articles#64I5 |
| opinion poll | WQAY86BX85 | definition | open | Wikipedia Glossary of probability and statistics#2N0M |
| Opinion polling and analysis about Islamic fundamentalism | 2QVRT8C6C3 | definition | open | Wikipedia Opinion polling and analysis about Islamic fundamentalism, Wikidata Q24950115 |
| Opinion polling for the 1966 United Kingdom general election | VXMVD7Q43E | definition | open | Wikipedia Opinion polling for the 1966 United Kingdom general election, Wikidata Q105730664 |
| Opinion polling for the 2009 Greek parliamentary election | HBQA8ZYEJT | definition | open | Wikipedia Opinion polling for the 2009 Greek parliamentary election, Wikidata Q106091801 |
| Opinion polling for the 2017 South Korean presidential election | G650HTVYB7 | definition | open | Wikipedia Opinion polling for the 2017 South Korean presidential election, Wikidata Q140611314 |
| Opinion polling for the 2018 Mexican general election | 1Q82V2KD08 | definition | open | Wikipedia Opinion polling for the 2018 Mexican general election, Wikidata Q47109851 |
| Opinion polling for the 2019 Greek parliamentary election | JYYTVGG1Y0 | definition | open | Wikipedia Opinion polling for the 2019 Greek parliamentary election, Wikidata Q25230482 |
| Opinion polling for the 2019 Indian general election | 3168Q0NY53 | definition | open | Wikipedia Opinion polling for the 2019 Indian general election, Wikidata Q30692953 |
| Opinion polling for the 2022 Israeli legislative election | 6ZQ48NJM12 | definition | open | Wikipedia Opinion polling for the 2022 Israeli legislative election, Wikidata Q106460485 |
| Opinion polling for the 2023 Dutch general election | Q4NZVEMJZ4 | definition | open | Wikipedia Opinion polling for the 2023 Dutch general election, Wikidata Q109044799 |
| Opinion polling for the 2024 Indian general election | G1WEQJQ2KY | definition | open | Wikipedia Opinion polling for the 2024 Indian general election, Wikidata Q121811804 |
| Opinion polling for the 2025 Dutch general election | D8ACDQMQAS | definition | open | Wikipedia Opinion polling for the 2025 Dutch general election, Wikidata Q131598141 |
| Opinion polling for the 2026 Israeli legislative election | MDDGXMX2KD | definition | open | Wikipedia Opinion polling for the 2026 Israeli legislative election, Wikidata Q116179077 |
| Opinion polling for the 2026 Portuguese presidential election | T5X03A3EBH | definition | open | Wikipedia Opinion polling for the 2026 Portuguese presidential election, Wikidata Q133696253 |
| Opinion polling for the 2029 Indonesian presidential election | G0K4DMMRBF | definition | open | Wikipedia Opinion polling for the 2029 Indonesian presidential election, Wikidata Q132851513 |
| Opinion polling for the May 2023 Greek parliamentary election | PSFHV1DW6H | definition | open | Wikipedia Opinion polling for the May 2023 Greek parliamentary election, Wikidata Q85791047 |
| Opinion polling for the next South Korean legislative election | NGDSHT4DKS | definition | open | Wikipedia Opinion polling for the next South Korean legislative election, Wikidata Q133865325 |
| Opinion polls in Venezuela | 46H3SGCGF3 | definition | open | Wikipedia Opinion polls in Venezuela, Wikidata Q129164898 |
| Opisometer | B2XG953WX9 | unknown | open | Wikipedia List of curves topics#D5O2 |
| Oppenheim conjecture | CWJQE3H4J5 | statement | open | Wikipedia Oppenheim conjecture, Wikidata Q7098547 |
| Oppenheimer–Snyder model | 2CWNC7207H | definition | open | Wikipedia Oppenheimer–Snyder model, Wikidata Q121493524 |
| Oppermann's conjecture | Z6TZ9YVF3B | statement | open | Wikipedia Brocard's conjecture#AYH0 |
| Oppermann's conjecture | ZSXC5MEQM7 | conjecture | open | Wikipedia Oppermann's conjecture, Wikidata Q3686828 |
| Opportunistic encryption | 9Z19YJBGGE | definition | open | Wikipedia Opportunistic encryption, Wikidata Q7098581 |
| Opportunistic TLS | ZDBX3XFZ9F | definition | open | Wikipedia Opportunistic TLS, Wikidata Q1435358 |
| Opportunistic Wireless Encryption | 3DHKBVM0W4 | definition | open | Wikipedia Opportunistic Wireless Encryption, Wikidata Q56319146 |
| opposite | W5WVK1BAPS | definition | open | Wikipedia Glossary of category theory#0LYB |
| opposite | X34Q5YTM90 | definition | open | Wikipedia Glossary of ring theory#05FD |
| Opposite algebras | YQ7P32KBBR | 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 2609.39700#NMUH |
| opposite category | F6FHHGCFXR | definition | open | Wikidata Q7098616, nLab opposite category, ProofWiki Definition:Dual_Category, Wikipedia Opposite category |
| Opposite category | G985S7GMVV | definition | open | Wikipedia List of dualities#U6CY |
| Opposite deterministic corner | FCABE7CM16 | 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 2609.24931#UU2Y |
| Opposite group | MX935AVTC8 | definition | open | Wikipedia Opposite group, Wikidata Q3117899 |
| opposite number | D2CTVNKGDN | definition | open | Wikidata Q715358, MathWorld AdditiveInverse, Wikipedia Additive inverse |
| Opposite oracle rare-risk orderings | 1HNFFJ9FMS | 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 2610.16845#9I81 |
| Opposite ring | PZMWPRA937 | definition | open | Wikipedia Opposite ring, Wikidata Q1940482 |
| Opposite Row--Max orderings before and after a common Haar rotation | AA49JTDAM5 | 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 2610.11309#8953 |
| opposite side | N08T0YFBCC | unknown | open | Wikidata Q140142007, MathWorld OppositeSide |
| Opposite simplicial set | H04657V4Y6 | definition | open | Wikipedia Opposite simplicial set, Wikidata Q134300081 |
| Opposite-necklace difference formula | DC7H05D02R | 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 2610.17100#BZ5M |
| Optic equation | 5FSS09R31W | definition | open | Wikipedia List of sums of reciprocals#D95S |
| Optic equation | FZ0FGTWVRM | definition | open | Wikipedia Optic equation, Wikidata Q21072626 |
| Optical aberration | NHXY4DW1B6 | definition | open | Wikipedia Optical aberration, Wikidata Q639 |
| Optical depth | R32S6G8RAQ | definition | open | Wikipedia Optical depth, Wikidata Q890809 |
| Optical equivalence theorem | GZ7HYQP07J | statement | open | Wikipedia List of theorems#J4IY |
| Optical equivalence theorem | J1N4EKAHPA | statement | open | mathlib_1000 Q7098850, Wikidata Q7098850, thousand_plus Q7098850, Wikipedia Optical equivalence theorem |
| Optical fiber | JQ3N8Y0HVK | definition | open | Wikipedia Optical fiber, Wikidata Q162 |
| optical illusion | D5D42CF6FH | unknown | open | Wikidata Q174923, MathWorld Illusion |
| Optical Kerr effect | DHNY5AJSNF | unknown | open | Wikipedia Kerr effect#GKJO |
| Optical parametric amplifier | 17ZPJSPNY5 | definition | open | Wikipedia Optical parametric amplifier, Wikidata Q5286948 |
| Optical path length | TTMXDNNEPP | definition | open | Wikipedia Optical path length, Wikidata Q1475329 |
| Optical phonon | 6KN3REDAYK | unknown | open | Wikipedia Phonon#0POQ |
| Optical rotation | YPZSHAVF2Y | definition | open | Wikipedia Optical rotation, Wikidata Q530648 |
| Optical signal-to-noise ratio | T7WATFRJ0T | unknown | open | Wikipedia Signal-to-noise ratio#8MMT |
| Optical space | 5TJVR8TFAB | definition | open | Wikipedia Optical space, Wikidata Q4381573 |
| Optical theorem | JD1P1FWCRF | statement | open | Wikipedia List of theorems#9L1K |
| Optical theorem | SCE2K41XHP | statement | open | mathlib_1000 Q1136262, Wikidata Q1136262, thousand_plus Q1136262, Wikipedia Optical theorem |
| Optical theorem in one dimension | 8XW5KP14VV | statement | open | Wikipedia S-matrix#61VS |
| Optical transfer function | 9H6BCWPSRV | definition | open | Wikipedia Optical transfer function, Wikidata Q1942321 |
| optical transfer function | YPF93ABYCA | definition | open | Wikipedia Optical transfer function#CKLX |
| Optical vortex | BPGYYW1J5Y | definition | open | Wikipedia Optical vortex, Wikidata Q2077002 |
| Optical-fiber lamp | 8C4583ME7Z | unknown | open | Wikipedia Optical fiber#7NCC |
| Opticks, or a Treatise of the Reflections, Refractions, Inflections and Colours of Light | CB28RGD31H | unknown | out_of_scope (a book, not an item of mathematics) | Wikidata Q74263, ProofWiki Book:Isaac_Newton/Opticks |
| optics | PVFH96C0DZ | topic | open | Wikidata Q14620, nLab optics, ProofWiki Definition:Optics |
| Optics (Al-Kindi) | AYJBY56AEA | unknown | open | Wikipedia Al-Kindi#RHQD |
| OPTICS algorithm | XGZJ2SHAS7 | definition | open | Wikipedia OPTICS algorithm, Wikidata Q2007847 |
| Optima (journal) | GDND36RE55 | unknown | open | Wikipedia Mathematical Optimization Society#XAOP |
| Optimal | 9YKNN78BVG | definition | 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 2602.19452#JLXU |
| Optimal advice partition is strongly NP-hard | E1X4R6DKD6 | 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 2609.21523#ZSYB |
| Optimal affine slice | FZN1EZ13ZR | 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 2610.20270#OJ07 |
| Optimal apportionment | 84WSTQNTDF | definition | open | Wikipedia Optimal apportionment, Wikidata Q108730491 |
| Optimal asymmetric encryption padding | 4VFC65EWQV | definition | open | Wikipedia Optimal asymmetric encryption padding, Wikidata Q1635634 |
| Optimal average score with a finite first moment | MJVZP2STVW | 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 2609.38228#SFUV |
| Optimal block reproduction | 28ND72VZGN | 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 2609.31816#3441 |
| Optimal buffer alignment per unit spectral norm | C3QD2ERFEV | 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 2610.03306#F9SO |
| Optimal common retention game | KA6CQWK8FZ | 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 2610.04027#3JHC |
| Optimal common-coordinatewise single-map factor | WHN87ZRFWX | 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 2610.04027#8PAG |
| Optimal computing budget allocation | 37A0D2EFB2 | unknown | open | Wikipedia List of numerical analysis topics#IEBE |
| Optimal contraction factor | Q6RSRGSSWV | 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#BO5N |
| Optimal control | BC4A9Q207H | example | 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 2610.11455#3GEI |
| Optimal control | CXQ7E0ERAH | definition | open | Wikipedia Optimal control, Wikidata Q1971426 |
| Optimal control of the $N$-auxiliary problem | 3KDMT7BRZG | 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 2609.24185#WN5N |
| Optimal Control Structure | Y6P27W9GF4 | 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 2610.02537#UOBJ |
| Optimal control theory | K2VF1D7ZGM | definition | open | Wikipedia Glossary of areas of mathematics#AQ4V |
| Optimal count-conditional frontier | 841JSHJF9E | 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 2609.31607#NKHQ |
| Optimal cuts, actions, and encodings | 4K650DT446 | definition | 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 2610.08821#IT9Q |
| optimal decision | W78WZP64K8 | definition | open | Wikipedia Glossary of probability and statistics#TVUN |
| Optimal decision | Y1ADBGHPHZ | definition | open | Wikipedia Optimal decision, Wikidata Q4335500 |
| Optimal decision | YJQ3M44XAS | definition | open | Wikipedia List of statistics articles#QMXA |