| Other axioms | 56HCW1C4H8 | statement | open | Wikipedia Dutch book arguments#EG05 |
| Other axioms for Schwinger functions | 168R7ZG82P | statement | open | Wikipedia Schwinger function#08UR |
| Other conjectures | TK503TKPP4 | statement | open | Wikipedia Conjecture#J075 |
| Other conjectures | X91CPKRHZD | statement | open | Wikipedia Selberg class#ZSI9 |
| Other existence theorems | 6PMWZ4BAS3 | statement | open | Wikipedia Picard–Lindelöf theorem#6KRY |
| Other extension theorems | QW79R7D0BP | statement | open | Wikipedia Szpilrajn extension theorem#ZMIW |
| Other forcing axioms | H353HNZ1T0 | statement | open | Wikipedia Proper forcing axiom#0LBX |
| Other forms of Rayleigh–Jeans law | 6BZ55FK2H0 | statement | open | Wikipedia Rayleigh–Jeans law#LTM6 |
| Other formulas | B40C5PMQR9 | statement | open | Wikipedia Somos' quadratic recurrence constant#XY71 |
| Other formulas | B612KSVSZH | statement | open | Wikipedia Shoelace formula#YTFP |
| Other formulas | FW4SSCEFYY | statement | open | Wikipedia Lambert W function#JJC0 |
| Other formulas | GVY3YVQVRH | statement | open | Wikipedia Dirichlet convolution#9DPN |
| Other formulas | NKHAYQGW7P | statement | open | Wikipedia Stirling numbers of the first kind#AFFS |
| Other formulas | YT88AB45RM | statement | open | Wikipedia Inclusion–exclusion principle#TC0U |
| Other formulations of the conjecture | QJKDV2AY9E | statement | open | Wikipedia Collatz conjecture#X0ZO |
| Other gluing axioms | FVS1EEDCZ4 | statement | open | Wikipedia Gluing axiom#HTFB |
| Other holomorphic fixed point theorems | 4D35F2FC1M | statement | open | Wikipedia Earle–Hamilton fixed-point theorem#CVSD |
| Other hypothesis | XTE75D2H0W | statement | open | Wikipedia Aryabhata#MS6J |
| Other identities and formulas | HXWJRDM434 | statement | open | Wikipedia Beta function#TQV6 |
| Other identities called the "law of cotangents" | PTRHJNSHV2 | statement | open | Wikipedia Law of cotangents#XKQC |
| Other models | W0WZPV1G69 | problem | 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 2610.15086#CKQQ |
| Other oracles | TXBGJ13BXP | 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 2610.12713#0YCV |
| Other propositions in the palimpsest | RF95M34A27 | statement | open | Wikipedia The Method of Mechanical Theorems#EEOZ |
| Other separation axioms | TGV5H6HT3K | statement | open | Wikipedia Separation axiom#WGYH |
| Other statements of the theorem | SV99Q27XKM | statement | open | Wikipedia Pappus's hexagon theorem#LU7L |
| Other theorems | VXERPXKDGS | statement | open | Wikipedia Cover's theorem#H3W0 |
| Other theorems about Fermat numbers | PSKDZQEQ3Q | statement | open | Wikipedia Fermat number#8PZN |
| Other theorems weaker than the twin prime conjecture | DEJGQ06RRZ | statement | open | Wikipedia Twin prime#3MY4 |
| Other versions of the paradox | BSK38J921F | statement | open | Wikipedia Omnipotence paradox#B17A |
| Other worlds strategy | E0CZRJTTGT | unknown | open | Wikipedia Nonexistent objects#OMVK |
| othonormal set | J8MMFW9EHS | concept | open | austin_ula index/6.3.2/othonormal-set |
| Otis Dudley Duncan | MKH8CGWQPM | unknown | open | Wikipedia List of fellows of the American Statistical Association#I06A |
| Otomar Hájek | QWGJ6XCH2C | topic | open | Wikipedia Otomar Hájek, Wikidata Q7108972 |
| Ott-Heinrich Keller | Z6XD789GMJ | topic | open | Wikipedia Ott-Heinrich Keller, Wikidata Q91648 |
| Ottaviano Fabrizio Mossotti | 2HATGSH4W3 | unknown | open | Wikipedia List of Italian mathematicians#DA20 |
| Ottaviano Menni | QHKCBSD3MR | topic | open | Wikipedia Ottaviano Menni, Wikidata Q18945705 |
| Ottavio Scarlattini | DWXX9YKWKR | topic | open | Wikipedia Ottavio Scarlattini, Wikidata Q20659036 |
| Otter theorem prover | TJ16PXCQA4 | unknown | open | Wikipedia List of mathematical logic topics#RIZE |
| Ottlik, Géza | JGHZEQ89W4 | unknown | open | Wikipedia List of Hungarian mathematicians#ULLF |
| Otto Blumenthal | 80WB623DSR | unknown | open | Wikipedia List of Jewish mathematicians#GJ76 |
| Otto Blumenthal | T6NP6QKVHW | unknown | open | Wikipedia List of people by Erdős number#E3FZ, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#LK6E |
| Otto calculus | 4HY9X6WK5A | definition | open | Wikipedia Otto calculus, Wikidata Q123930132 |
| Otto cycle | 9C5QX1BDE6 | definition | open | Wikipedia Otto cycle, Wikidata Q201762 |
| Otto Dersch | CF8HC5DVDC | topic | open | Wikipedia Otto Dersch, Wikidata Q27126 |
| Otto Dersch | DSACFVZECF | topic | open | Wikipedia List of German mathematicians#RK7O |
| Otto E. Neugebauer | 5R9M8WGH5G | topic | open | Wikipedia Otto E. Neugebauer, Wikidata Q111996 |
| Otto E. Neugebauer | H6RVY9JJM5 | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#GYKM, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#SV2K |
| Otto Eckstein | CFMAZEWT7R | unknown | open | Wikipedia List of fellows of the American Statistical Association#XO9T |
| Otto Forster | AM3P08GS5G | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#FJMG |
| Otto Forster | RZ5G684C62 | topic | open | Wikipedia Otto Forster, Wikidata Q1516609 |
| Otto Frostman | SBEGX2NRWX | topic | open | Wikipedia Otto Frostman, Wikidata Q5745816 |
| Otto Frostman | YH2MFCVHZ9 | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#UPGE |
| Otto Grün | NN6N5FZZVH | topic | open | Wikipedia Otto Grün, Wikidata Q2038978 |
| Otto H. Kegel | Q8NBVSPSD3 | topic | open | Wikipedia Otto H. Kegel, Wikidata Q2039017 |
| Otto Haupt | XEB0QNV212 | topic | open | Wikipedia Otto Haupt, Wikidata Q87499 |
| Otto Hesse | 8BA37C22RX | topic | open | Wikipedia List of German mathematicians#MNDY |
| Otto Hesse | J4WCBV3495 | topic | open | Wikipedia Otto Hesse, Wikidata Q60397 |
| Otto Hölder | QT9RBSF0GZ | topic | open | Wikipedia Otto Hölder, Wikidata Q60895 |
| Otto Hölder | VDGT7SSV28 | topic | open | Wikipedia List of real analysis topics#QUBN |
| Otto Leiberich | 4Y72T6CG07 | topic | open | Wikipedia Otto Leiberich, Wikidata Q1302475 |
| Otto Leiberich | F3Q85W3ZY0 | topic | open | Wikipedia List of cryptographers#84OC |
| Otto M. Nikodym | J5QQ8CR1Y5 | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#SGXY |
| Otto M. Nikodym | MTEXTJAW61 | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q1259589, ProofWiki Mathematician:Otton_Marcin_Nikodym, Wikipedia Otto M. Nikodym |
| Otto Mühlendyck | 7JNQEFCKH5 | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#OYTR |
| Otto Preminger | MXHK1EJRDX | unknown | open | Wikipedia List of Ukrainian Jews#MNE6 |
| Otto Schilling | V90T787P60 | topic | open | Wikipedia List of German mathematicians#92I3 |
| Otto Schilling | VHT7FJQ4T4 | topic | open | Wikipedia Otto Schilling, Wikidata Q84773 |
| Otto Schreier | BCCQGCZ6PG | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q86109, nLab Otto Schreier, Wikipedia Otto Schreier |
| Otto Schreier | FF612W1EET | topic | open | Wikipedia List of Jewish mathematicians#AAYT |
| Otto Stern | 5K8JK2FH8S | unknown | open | Wikipedia List of people by Erdős number#DVZI |
| Otto Szász | FQA63RKHYY | unknown | open | Wikipedia List of Jewish mathematicians#L22C |
| Otto Szász | QFHTMRFEFT | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#C3AI |
| Otto Toeplitz | 4KCM1R2QE8 | topic | open | Wikipedia List of German mathematicians#B2H3 |
| Otto Toeplitz | JJ4HYAF118 | topic | open | Wikipedia List of mathematicians born in the 19th century#ILNG |
| Otto Toeplitz | QED6WVBJAK | topic | open | Wikipedia Otto Toeplitz, Wikidata Q61763 |
| Otto Toeplitz | QG3CZQJPHV | topic | open | Wikipedia List of Jewish mathematicians#YM44 |
| Otto Weininger | 8ZGAYX67DZ | topic | open | Wikipedia Otto Weininger, Wikidata Q78513 |
| Ottolini and Steinerberger | TJ1CFG2CFF | 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 2610.17479#M439 |
| Ottolini and Tripathi | D4JQM3E8R5 | 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 2610.17479#T7E4 |
| Otway–Rees protocol | Y4N25899Y8 | definition | open | Wikipedia Otway–Rees protocol, Wikidata Q1320237 |
| Ou | RVBB1D3J60 | 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 2609.20197#8AMY |
| OU population approximation | 4Y8H53134Z | 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 2609.32026#ZAGH |
| Oum Sang-il | 962TS1R0AH | topic | open | Wikipedia Oum Sang-il, Wikidata Q95719643 |
| our notation | 3PFJZWJ7DK | 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 2609.39293#ITSU |
| our notation | ADTC6MD8A8 | 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 2609.39293#IR42 |
| our notation | C3NTGF1830 | 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 2609.39293#BR98 |
| our type convention | DVBBE0WNQH | 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 2609.39293#4HA4 |
| Ouroboros | 67DBZ651ND | definition | open | Wikipedia Ouroboros (protocol), Wikidata Q104848356 |
| Out of Asia theory | 8788VT8H8F | unknown | open | Wikipedia List of superseded scientific theories#KMD9 |
| Out shuffle | 3P498KCZYW | concept | open | Wikidata Q7111825, MathWorld Out-Shuffle |
| Out(Fn) | 5DKZYD58RP | definition | open | Wikipedia Out(Fn), Wikidata Q7111377 |
| out-degree | 701VVYP9NZ | definition | open | Wikipedia Glossary of graph theory#81JW |
| Out-of-bag error | 9Y5T3D5SP9 | definition | open | Wikipedia Out-of-bag error, Wikidata Q25100230 |
| Outcome | 1QH2PGKMDG | definition | open | Wikipedia Outcome (game theory), Wikidata Q7111912 |
| outcome | V2WQ2CKW8M | definition | node (a node has the same Wikidata item as the row) | Wikidata Q17104930, MathWorld Outcome, Wikipedia Outcome (probability) |
| Outcome bias | 4WYF3REN3V | unknown | open | Wikipedia List of cognitive biases#AA8I |
| Outcome chance node | P3H6AQZVF4 | 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 2609.26265#3647 |
| Outcome space | 68GFQYV8CR | definition | open | Wikipedia Glossary of game theory#HE82 |
| Outcome switching | T9DSAZ88CC | definition | open | Wikipedia Outcome switching, Wikidata Q126009023 |
| Outcome-adaptive augmentation | D6EH3YGKD1 | 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 2610.09030#PU52 |