| Observational lexical equivalence | SXDAASWCKK | 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 2609.20207#YAU7 |
| Observational methods in psychology | 80G4J0YGHP | definition | open | Wikipedia Observational methods in psychology, Wikidata Q862797 |
| Observational study | 3PGAP79Q4M | topic | open | Wikipedia Observational study, Wikidata Q818574 |
| Observational study | G6WR1PCK7Q | topic | open | Wikipedia List of statistics articles#JV8J |
| Observational study | M361TS2KBC | topic | open | Wikipedia List of psychological research methods#0SRL |
| Observations and the relaxed class | JQDYXSFWHV | 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 2610.05164#9JAD |
| Observations conflicting with Newton's formula | JGN7EM5JM4 | statement | open | Wikipedia Newton's law of universal gravitation#VRZ8 |
| Observed exogenous information | YV7YHVFB0N | 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 2609.38268#575Z |
| Observed information | DG34VB22WB | definition | open | Wikipedia List of statistics articles#PWF1 |
| Observed information | JJES6XWRR9 | definition | open | Wikipedia Observed information, Wikidata Q7075478 |
| Observed Information Convergence | VRA53EAWXS | 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 2609.20041#9CUB |
| Observed radial smoothing | A14WH288YD | 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 2610.15202#I5DX |
| Observer bias | C6RMYPNTDB | definition | open | Wikipedia Observer bias, Wikidata Q84604882 |
| observer effect | B5B3ZCCJGP | unknown | open | Wikipedia List of paradoxes#F6HP |
| Observer effect | KA0ZWEX0QZ | definition | open | Wikipedia Observer effect, Wikidata Q7075488 |
| Observer-expectancy effect | SN336PP8V1 | unknown | open | Wikipedia List of cognitive biases#8BA6 |
| Obstacle problem | 6SC2P4E9QW | problem | open | Wikipedia Obstacle problem, Wikidata Q3406250 |
| Obstruction below the endpoint | VHEBNY5HP0 | 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 2609.27774#2RBA |
| Obstruction bundle | KS9G40TMBQ | 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 2609.28501#BHQ4 |
| obstruction cocycle | 5BN4W444JE | definition | open | Wikipedia Glossary of algebraic topology#VJPO |
| Obstruction set | FTDZ323RXE | unknown | open | Wikipedia Robertson–Seymour theorem#O6JA |
| Obstruction size and variables | 9080Y41D2A | 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 2610.01329#LFN2 |
| obstruction theory | 207E2VJT8J | definition | open | Wikipedia Glossary of algebraic topology#IBSJ |
| Obstruction theory | J1FPVQTHHF | definition | open | Wikipedia List of algebraic topology topics#YLRL |
| obstruction theory | KTN0D1AAPE | definition | open | Wikidata Q1017338, MathWorld Obstruction, Wikipedia Obstruction theory |
| Obstruction to a weakly continuous $q$-Hessian measure | Y515NDNP2T | 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 2610.19410#X70T |
| Obstruction to braided equivalence | H5NG66WE8M | 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 2609.33231#8ACD |
| Obstruction to positive scalar representations | X1TRYFGAGZ | 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 2609.26066#TDX8 |
| Obstructions to diameter-only bounds and at the threshold | PX0283STWV | 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 2610.00501#J7RC |
| obtuse angle | XE5PQJ0H05 | unknown | open | Wikidata Q2802178, MathWorld ObtuseAngle |
| obtuse triangle | 3WHE0QGRY0 | unknown | open | Wikidata Q3998573, MathWorld ObtuseTriangle |
| obverse | 8NBFEFJ022 | definition | open | Wikipedia Glossary of logic#94ON |
| obversion | 196YHCZRF7 | definition | open | Wikipedia Glossary of logic#7ZUD |
| Obversion | 3T0M481KMY | definition | open | Wikipedia Obversion, Wikidata Q3776150 |
| Obvious strategyproofness | CX91M0SDYJ | unknown | open | Wikipedia Strategyproofness#BERG |
| obviously | Q20SSKE60E | definition | open | Wikipedia Glossary of mathematical jargon#WZLR |
| OCA | R9KTVY0X75 | definition | open | Wikipedia Glossary of set theory#2I32 |
| OCB mode | N4NB3JR8QV | definition | open | Wikipedia OCB mode, Wikidata Q7072347 |
| Occam's razor | 779GX081HT | definition | open | Wikidata Q131012, ProofWiki Occam's_Razor, Wikipedia Occam's razor |
| Occupancy frequency distribution | AFARAFGYRY | definition | open | Wikipedia Occupancy frequency distribution, Wikidata Q7075746 |
| Occupancy frequency distribution | KKJVEA0VH2 | definition | open | Wikipedia List of statistics articles#BO4Y |
| Occupancy grid mapping | V9HN9E8WHS | definition | open | Wikipedia Occupancy grid mapping, Wikidata Q7075747 |
| Occupancy grid mapping algorithm | HDWDJSVA35 | definition | open | Wikipedia Occupancy grid mapping#X09T |
| Occupation measure bound without a spectral gap | G0SFC6QD5S | 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 2610.13916#3Z4T |
| Occupation time formula | GP88ZQJZ95 | statement | open | Wikipedia Wiener process#HB72 |
| Occupation, terminal and initial measures | ZR5YMB18AF | 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 2609.30821#JCY3 |
| Occupation-number formula | 45RFDQRH00 | 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 2610.00396#WXME |
| Occupational Depression Inventory | HV7VQ5GWK1 | definition | open | Wikipedia Occupational Depression Inventory, Wikidata Q118903148 |
| Occupational epidemiology | BX6CXN8EPT | definition | open | Wikipedia Occupational epidemiology, Wikidata Q24884463 |
| Occurence time | 4ZEKQS3NXC | unknown | open | Wikipedia Ergodic theory#60D2 |
| Occurrence (type-token distinction) | TVTNA7PGYH | unknown | open | Wikipedia Type–token distinction#V1RW |
| Occurrence-level semantics for process trees | 505Y6TSS0W | 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 2609.20478#NMLA |
| Occurs check | 9XFY008HWV | definition | open | Wikipedia Occurs check, Wikidata Q1664622 |
| Ocean gyre | SBE4D6PQSB | definition | open | Wikipedia Ocean gyre, Wikidata Q1250263 |
| Ocean-atmosphere exchange | KPTM17G5J6 | unknown | open | Wikipedia Physical oceanography#P0T0 |
| oceanography | 9TPBCYDF8D | unknown | open | Wikidata Q43518, EoM Oceanography,_mathematical_problems_in |
| Ocho Ríos | JVNJH24CCJ | unknown | open | Wikipedia List of places with numeric names#FY3R |
| Ockham algebra | P5C3ZTZQZ5 | definition | open | Wikipedia List of order theory topics#MHQD |
| Ockham algebra | QWTNYYSYRE | definition | open | Wikidata Q7076549, EoM Ockham_algebra, Wikipedia Ockham algebra |
| Octacontagon | P6BGVXMH89 | definition | open | Wikipedia List of two-dimensional geometric shapes#G1U0 |
| octacontagon | VW5ZNQCZRT | unknown | open | Wikidata Q3348766, MathWorld Octacontagon |
| Octacontagon | Z05TX4SHB4 | definition | open | Wikipedia List of mathematical shapes#QYAN, Wikipedia List of polygons, polyhedra and polytopes#Z3IC |
| Octacube | A6S3FH9MV4 | definition | open | Wikipedia Octacube (sculpture), Wikidata Q7076681 |
| octad | SK1X7GKDVJ | definition | open | Wikipedia Glossary of classical algebraic geometry#J78T |
| Octadecagon | ET76K9XNKF | definition | open | Wikipedia List of two-dimensional geometric shapes#UB5V |
| octadecagon | K34WAWPY6B | definition | open | Wikidata Q1054120, MathWorld Octadecagon, Wikipedia Octadecagon |
| Octadecagon | VEQ2RXARBT | definition | open | Wikipedia List of mathematical shapes#4C0E, Wikipedia List of mathematical shapes#KADB, Wikipedia List of polygons, polyhedra and polytopes#42IO |
| octadecagonal number | APEDFY5G5D | object | open | Wikidata Q18452301, OEIS A051870 |
| Octadecahedron | 13Z7T6E4KK | object | open | Wikipedia Octadecahedron, Wikidata Q6607152 |
| Octagon | SFAKPDNSB3 | definition | open | Wikipedia List of two-dimensional geometric shapes#VE4U |
| Octagon | WE9T8Y0RPT | definition | open | Wikipedia List of mathematical shapes#5BXW, Wikipedia List of mathematical shapes#7BMQ, Wikipedia List of polygons, polyhedra and polytopes#N30M |
| octagon | Y8BPRXNS0X | definition | open | Wikidata Q166080, MathWorld Octagon, Wikipedia Octagon |
| octagonal number | P2APZKWGM3 | definition | open | Wikidata Q2634498, MathWorld OctagonalNumber, OEIS A000567, ProofWiki Definition:Octagonal_Number, Wikipedia Octagonal number |
| octagonal prism | HNKGHS5126 | definition | open | Wikidata Q3100797, MathWorld OctagonalPrism, Wikipedia Octagonal prism |
| Octagonal prism | K1Z10CNWY8 | definition | open | Wikipedia List of polygons, polyhedra and polytopes#PQSZ |
| Octagonal pyramid | MH185RZZV5 | definition | open | Wikipedia List of polygons, polyhedra and polytopes#BS27 |
| Octagonal tiling | 5RSVY4NN71 | object | open | Wikipedia Octagonal tiling, Wikidata Q7076726 |
| Octagram | 9CX52SY6G1 | definition | open | Wikipedia List of mathematical shapes#MVZO, Wikipedia List of polygons, polyhedra and polytopes#WWF3 |
| octagram | CWSCSZCR19 | definition | open | Wikidata Q2622857, MathWorld Octagram, Wikipedia Octagram |
| Octagrammic antiprism | J60TQPA4B8 | object | open | Wikipedia Octagrammic antiprism, Wikidata Q7076727 |
| Octagrammic prism | GGQANFQRZP | object | open | Wikipedia Octagrammic prism, Wikidata Q7076730 |
| Octahectogon | X7P91SD2EN | unknown | open | Wikipedia List of two-dimensional geometric shapes#SFII |
| octahedral -sphere | EHD3WJA22H | definition | open | Wikipedia N-sphere#B7B4 |
| octahedral axiom, unstable | 1AD463S480 | concept | open | hott_book index/3.9/octahedral-axiom-unstable |
| Octahedral cupola | 5XCFW3MZ70 | definition | open | Wikipedia Octahedral cupola, Wikidata Q18356118 |
| octahedral graph | SF73TYBJTX | unknown | open | Wikidata Q3115589, House of Graphs 226, MathWorld OctahedralGraph |
| octahedral number | X9K577SCNH | definition | open | Wikidata Q2627321, MathWorld OctahedralNumber, OEIS A005900, Wikipedia Octahedral number |
| Octahedral prism | JVKZSHPD9A | definition | open | Wikipedia Octahedral prism, Wikidata Q7076741 |
| Octahedral pyramid | FN6XHWTVCX | definition | open | Wikipedia Octahedral pyramid, Wikidata Q17099514 |
| Octahedral symmetry | AQ9Z2XPPQH | definition | open | Wikipedia List of uniform tilings on the sphere, plane, and hyperbolic plane#V3QZ |
| Octahedral-hexagonal tiling honeycomb | QPW5SQ7FFR | definition | open | Wikipedia Octahedral-hexagonal tiling honeycomb, Wikidata Q17077871 |
| octahedron | 9Z5MG8KGVT | object | open | Wikidata Q188884, MathWorld Octahedron, nLab octahedron, Wikipedia Octahedron |
| octahedron | DY71S4SY9Z | concept | open | levin_dmoi index/5.3.2/octahedron |
| Octahemioctacron | BMGX55WAG5 | object | open | Wikipedia List of polygons, polyhedra and polytopes#4153 |
| octahemioctacron | MSMWYJ0CRD | unknown | open | Wikidata Q18048474, MathWorld Octahemioctacron |
| Octahemioctacron | T139NSHC08 | unknown | open | Wikipedia Octahemioctahedron#PRU1 |
| Octahemioctahedron | J31XHPYMWP | object | open | Wikipedia List of polygons, polyhedra and polytopes#110X |
| octahemioctahedron | YAKGYC8YEF | object | open | Wikidata Q3100435, MathWorld Octahemioctahedron, Wikipedia Octahemioctahedron |
| Octal | 127RFEF044 | definition | open | Wikipedia List of numeral system topics#6DV2 |
| octal | 5YR0RWK918 | definition | open | Wikidata Q76463, MathWorld Octal, ProofWiki Definition:Octal_Notation, Wikipedia Octal |