| Undeceptions | 78P3FHWETF | unknown | open | Wikipedia Arthur Schopenhauer#E4YO |
| undecic | B3SJRT77BC | definition | open | Wikipedia Glossary of invariant theory#512E |
| Undecidable language | S7T77PPD44 | problem | open | Wikipedia List of mathematical logic topics#H743 |
| undecidable problem | W3JXKPA6AQ | problem | open | Wikidata Q3502995, MathWorld RecursivelyUndecidable, Wikipedia Undecidable problem |
| undecimal | ZEQ4WXCYVX | definition | open | Wikidata Q5357322, ProofWiki Definition:Undecimal_Notation |
| Undecimated wavelet transform | WTHR1Z2MEX | unknown | open | Wikipedia List of wavelet-related transforms#PSLO |
| undecimic | 3R3WH3BDA3 | definition | open | Wikipedia Glossary of invariant theory#4508 |
| undefined | J6GNVWMM47 | definition | open | Wikipedia List of mathematical abbreviations#ALHU |
| undefined | NT0WVFFKH5 | definition | open | Wikipedia List of mathematical abbreviations#C1J9 |
| undefined | XWF0KZY6QK | concept | open | Wikidata Q7883028, MathWorld Undefined, Wikipedia Undefined (mathematics) |
| Under Darcy's law | F8F7HK5HKX | statement | open | Wikipedia Darrieus–Landau instability#Y3SY |
| Under every tilt | 9ZA1X0M3BX | 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 2610.06490#SX83 |
| under GRH | F0A49HJZ03 | 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 2610.05914#P1PS |
| under GRH | QSTAN9Q8J9 | 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 2610.05914#GDJX |
| Underactuation | KS4MWZWQE0 | definition | open | Wikipedia Underactuation, Wikidata Q7883433 |
| Underdamped annealing with UBU | SXWVV9MA8S | 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 2609.28611#1QM2 |
| Underdamped moment bound | FNH829T7DZ | 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 2609.32446#3LX0 |
| Underdetermined system | B4BQYFCDPV | definition | open | Wikipedia Underdetermined system, Wikidata Q4316110 |
| Underdispersion | 16Q1TXVS22 | definition | open | Wikipedia List of statistics articles#DMP3 |
| Underdog effect | RWN2E5T1BS | unknown | open | Wikipedia Opinion poll#MVNT |
| Underfitting | Y9W9EGM1Z3 | definition | open | Wikipedia List of statistics articles#ZCXU |
| Undergraduate Texts in Mathematics | JHD1G45QZA | definition | open | Wikipedia Undergraduate Texts in Mathematics, Wikidata Q7883592 |
| Underlying $G$-spectrum | 5QK3VP4DDS | 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 2610.21675#0R3G |
| Underlying $G$-spectrum | WYD5SEVNGW | 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 2610.21675#XBVW |
| Underlying principle | 4C6E8S39EY | statement | open | Wikipedia Generalized Stokes theorem#8KDK |
| Underlying principle | G02Z4KZDFQ | statement | open | Wikipedia Antithetic variates#2XSE |
| Underlying principle | TGN2ACQ9NB | statement | open | Wikipedia Control variates#Q9E3 |
| Underlying principle of the CRN technique | CD9MHD8JMT | statement | open | Wikipedia Variance reduction#2EVM |
| Underlying principles | 5BRSH13PAD | statement | open | Wikipedia Granger causality#83AA |
| Underlying principles | CPR8PRT72M | statement | open | Wikipedia Fractal analysis#ZP5C |
| underlying set | EHE3HKK8SW | unknown | open | Wikidata Q2456981, nLab underlying set |
| Underlying-set functors | ZFYY77W3KZ | 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 2609.33469#B04K |
| Underprivileged area score | 5MS1KVCK9F | definition | open | Wikipedia List of statistics articles#3ZAH |
| Undersampled time series | E5APDMMTVD | 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 2610.02637#JNXT |
| Understanding Physics | P3X2GWVN7W | unknown | out_of_scope (a book, not an item of mathematics) | Wikidata Q7883795, ProofWiki Book:Isaac_Asimov/Understanding_Physics |
| Understanding the axioms | D0PKJZCZ0B | statement | open | Wikipedia Operad#X6R9 |
| Underwood Dudley | M5QZP3E1EV | topic | open | Wikipedia List of people by Erdős number#5BET |
| Underwood Dudley | W29SFXFV4Y | topic | open | Wikipedia Underwood Dudley, Wikidata Q536384 |
| undetermined coefficients | E6M5V6VWNN | concept | open | lebl_diffyqs index/6.5.2/undetermined-coefficients |
| undetermined coefficients, for second-order systems | DW8A1KG54D | concept | open | lebl_diffyqs index/10.9.3/undetermined-coefficients-for-second-order-systems |
| undetermined coefficients, for second-order systems | K9KGVVPM14 | concept | open | lebl_diffyqs index/10.6.3/undetermined-coefficients-for-second-order-systems |
| undetermined coefficients, for systems | DWKJJ5QC28 | concept | open | lebl_diffyqs index/10.9.1/undetermined-coefficients-for-systems |
| undirected | HNP594YDNB | definition | open | Wikipedia Glossary of graph theory#17IB |
| undirected graph | XQT8D9FF6N | concept | open | Wikidata Q3115587, MathWorld UndirectedGraph |
| Undirected multigraph (edges with own identity) | BQWREPBYB6 | statement | open | Wikipedia Multigraph#QTX0 |
| Undirected multigraph (edges without own identity) | WW2PS9JD7N | statement | open | Wikipedia Multigraph#C5JG |
| undulating number | A377ZTSZFB | definition | open | Wikidata Q3343081, MathWorld UndulatingNumber, OEIS A033619, Wikipedia Undulating number |
| Undulating prime | TSEH8BFHPE | unknown | open | Wikipedia Undulating number#0H86 |
| undulation | BWYYJSN7WA | definition | open | Wikipedia Glossary of classical algebraic geometry#GG3Z |
| Unduloid | BSS590GMKB | definition | open | Wikipedia Unduloid, Wikidata Q3505271 |
| Unemployment in Bulgaria | GM0GEJDD06 | unknown | open | Wikipedia Demographics of Bulgaria#UVUX |
| Unemployment in Scotland | AHE7KR6V2E | definition | open | Wikipedia Unemployment in Scotland, Wikidata Q20877322 |
| Unequal breaks | G4DWR1PR9W | 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 2610.04099#NCK9 |
| Unequal breaks: bijective critical maps | CPSBM44H46 | 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 2609.30301#1KKT |
| Unethical human experimentation | 8GM92HGSMP | definition | open | Wikipedia Unethical human experimentation, Wikidata Q19929707 |
| Unevenly spaced time series | 18AKNW9CK3 | definition | open | Wikipedia Unevenly spaced time series, Wikidata Q7884241 |
| Unevenly spaced time series | 58MD6DTW9W | definition | open | Wikipedia List of statistics articles#OJSC |
| Unexpected hanging paradox | MNXPDDKF1J | statement | open | Wikipedia Backward induction#6IWO |
| unexpected hanging paradox | Q0PANNVY6S | statement | open | Wikidata Q1142663, MathWorld UnexpectedHangingParadox, Wikipedia Unexpected hanging paradox |
| Unfoldable cardinal | CW2ZKZB1TQ | definition | open | Wikipedia List of mathematical logic topics#BHHY |
| Unfoldable cardinal | YWPV88JZ7N | definition | open | Wikipedia Unfoldable cardinal, Wikidata Q7884364 |
| unfoldable cardinal | ZGJZEV0SC5 | definition | open | Wikipedia Glossary of set theory#HR9H |
| Unfolding | 7X3DAQC9YS | definition | open | Wikipedia Unfolding (functions), Wikidata Q7884367 |
| Unfolding the twist relation | G194GMZ4N5 | 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 2610.07905#OGVD |
| unforced motion | QJ93K5W17P | concept | open | lebl_diffyqs index/6.4.1/unforced-motion |
| Unforced spectral Galerkin solutions | 8YRF5X0CC7 | 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 2609.33033#FH1U |
| Unforced two-dimensional Leray--Hopf solution | 8F994TV1GB | 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 2609.33033#OQF7 |
| Unfriendly partition | 6QJCDNV47M | conjecture | open | Wikipedia List of unsolved problems in mathematics#DW55 |
| Unfriendly partition | SWTBQCHEDB | conjecture | open | Wikipedia Unfriendly partition, Wikidata Q112740261 |
| unfurling | P00GKYY49B | 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 2609.37520#J11O |
| Ungula | 9P347Q4KJ9 | definition | open | Wikipedia Ungula, Wikidata Q27995891 |
| Uniaxial crystal | 30TY00VVZP | unknown | open | Wikipedia Birefringence#0SMK |
| unibranch | JAQ76KSC0X | definition | open | Wikipedia Glossary of commutative algebra#PCO8 |
| unibranch | SVK5F3GRYF | definition | open | Wikipedia Glossary of classical algebraic geometry#43EC |
| Unibranch local ring | 1SCAJSCFW5 | definition | open | Wikipedia Unibranch local ring, Wikidata Q7884695 |
| Unicity distance | 3ZCT485H0Y | definition | open | Wikipedia Unicity distance, Wikidata Q1640661 |
| Unicity Theorem of the reconstruction | MWZGWQ6YKB | statement | open | Wikipedia Cauchy wavelet#LUYJ |
| Unicode collation algorithm | WPVG18044M | unknown | open | Wikipedia List of algorithms#MM18 |
| Unicoherent | GA4Z0Q1EF9 | definition | open | Wikipedia List of general topology topics#FBCD |
| unicoherent space | 4MCGY2XW14 | concept | open | Wikidata Q7884743, MathWorld UnicoherentSpace, Wikipedia Unicoherent space |
| unicursal | Q1975P1AQW | definition | open | Wikipedia Glossary of classical algebraic geometry#GDBQ |
| unicyclic graph | YBE5DZHNJ1 | unknown | open | Wikidata Q137545222, MathWorld UnicyclicGraph |
| Unicyclic graphs | WK67H97K68 | 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 2609.34260#2WAQ |
| unification | 7F5KRHDAMQ | definition | open | Wikidata Q609057, MathWorld Unification, Wikipedia Unification (computer science) |
| Unification algorithms | 5N2B22XC8N | definition | open | Wikipedia Unification (computer science)#6KQY |
| Unified charge and value budget | DYNSNJCZ0G | 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 2609.20701#4STD |
| Unified fixed-depth Sobolev rates | KYGS98RSD3 | 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 2610.16094#TFFP |
| Unified fixed-depth Sobolev rates | MEPTYVK9XZ | 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 2610.16094#4LVF |
| Unified Foundational Ontology | M4T73EGS17 | definition | open | Wikipedia Unified Foundational Ontology, Wikidata Q99543632 |
| Unified Gaussian movement for $\p<2$ | YAK1SXYQBQ | 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 2609.20701#PU5D |
| Unified neutral theory of biodiversity | 57358NXTAP | topic | open | Wikipedia Unified neutral theory of biodiversity, Wikidata Q7884982 |
| Unified oracle inequalities for \(L^1\)- and \(L^2\)-norms | SW664DJ5AC | 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 2610.11760#W2MU |
| Unified Prefix-Completion Count | QY4V55YC4G | 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 2610.09998#SE40 |
| Unified shader model | Q7P2M04TQ1 | unknown | open | Wikipedia List of computer graphics and descriptive geometry topics#Q1N7 |
| Unified super-fast analytic Richardson rate | 953V48M823 | 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 2610.16094#1NA9 |
| Unified super-fast analytic Richardson rate | GZQGYZ69TV | 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 2610.16094#9T0Y |
| Unified super-fast analytic Richardson rates | 86679P615R | 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 2610.16094#WZYU |
| Unified super-fast analytic Richardson rates | DR79AAJW1P | 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 2610.16094#X5VM |
| unified threshold for flag ambient complexes | V0TGK6ZPKV | 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 2609.32733#M61Z |
| Unified type system | GSDAW3EP68 | unknown | open | Wikipedia Type system#GKLV |