| Ulisse Stefanelli | VTTF927ERA | topic | open | Wikipedia Ulisse Stefanelli, Wikidata Q59903350 |
| Ulla Dinger | SMK48BXFFB | topic | open | Wikipedia Ulla Dinger, Wikidata Q56331609 |
| Ulla Pursiheimo | 95Q8W4NVGE | topic | open | Wikipedia Ulla Pursiheimo, Wikidata Q29418887 |
| Ulm factor | QJE503YGCP | unknown | open | Wikipedia Height (abelian group)#GRZN |
| Ulm's theorem | 9WR7T1H36J | statement | open | Wikipedia Height (abelian group)#60QJ |
| Ulpian's life table | SPASPZQ3J7 | definition | open | Wikipedia Ulpian's life table, Wikidata Q3512779 |
| Ulrica Wilson | MFZYCRZDWP | topic | open | Wikipedia Ulrica Wilson, Wikidata Q57059022 |
| Ulrich Bunke | A2MM3NMKJH | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q15303086, nLab Ulrich Bunke |
| Ulrich Görtz | CDVBJ0JAH2 | topic | open | Wikipedia Ulrich Görtz, Wikidata Q102279490 |
| Ulrich Güntzer | P8W6WPAZ42 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q38222960, nLab Ulrich Güntzer |
| Ulrich Kohlenbach | 8PNTE63E8F | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#HLMZ |
| Ulrich Kohlenbach | K7D6A9V2T7 | topic | open | Wikipedia Ulrich Kohlenbach, Wikidata Q7879836 |
| Ulrich Kulisch | 7FWZV2X1NB | topic | open | Wikipedia Ulrich Kulisch, Wikidata Q18222621 |
| Ulrich Kulisch | F1QFAG3CYG | topic | open | Wikipedia List of German mathematicians#YJ3Q |
| Ulrich Pinkall | A8799FS7AY | topic | open | Wikipedia Ulrich Pinkall, Wikidata Q15455557 |
| Ulrich Pinkall | NS3HB80CD1 | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#W2GW |
| Ulrich Stuhler | MR469JADWK | topic | open | Wikipedia List of German mathematicians#QBOI |
| Ulrich Stuhler | NVBV2Y448B | topic | open | Wikipedia Ulrich Stuhler, Wikidata Q115398 |
| Ulrich W. Kulisch | JJKVEWNEVZ | topic | open | Wikipedia List of numerical analysis topics#0LLX |
| Ulrik Buchholtz | 5AGF4J5KRM | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q59749232, nLab Ulrik Buchholtz |
| Ulrike Grömping | SJG6YRZCP7 | topic | open | Wikipedia Ulrike Grömping, Wikidata Q102336730 |
| Ulrike Leopold-Wildburger | 8GEVP3V6QD | topic | open | Wikipedia Ulrike Leopold-Wildburger, Wikidata Q18028897 |
| Ulrike Meier Yang | 1BREP8DDV1 | topic | open | Wikipedia Ulrike Meier Yang, Wikidata Q102196885 |
| Ulrike Sattler | 8JTS0SE25F | topic | open | Wikipedia Ulrike Sattler, Wikidata Q7879911 |
| Ulrike Tillmann | 810H5AKNZF | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q92006, nLab Ulrike Tillmann, Wikipedia Ulrike Tillmann |
| Ulrike Tillmann | ZVM1VW8VPH | topic | open | Wikipedia List of people by Erdős number#7B1Y, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#Q7UB, Wikipedia List of German mathematicians#I2PK |
| Ult | 5A45FY425F | definition | open | Wikipedia Glossary of set theory#X38I |
| Ultima (finance) | AGBB4QH675 | unknown | open | Wikipedia Greeks (finance)#HZ7U |
| Ultimate attribution error | 9H3T65FN1Q | unknown | open | Wikipedia List of cognitive biases#F1J1 |
| Ultimate Boeing 747 gambit | WB0BTD8RJ2 | definition | open | Wikipedia Ultimate Boeing 747 gambit, Wikidata Q2510067 |
| Ultimate Gilbreath principle | YZP67M459G | statement | open | Wikipedia Gilbreath shuffle#4J3C |
| Ultimate reality | ND13BDK2JJ | definition | open | Wikipedia Ultimate reality, Wikidata Q65088854 |
| Ultimatum game | XZEV5X8963 | definition | open | Wikipedia Ultimatum game, Wikidata Q2295916 |
| Ultra | 1DH33BXGHC | definition | open | Wikipedia Ultra (cryptography), Wikidata Q825712 |
| Ultra-commutative localization | ZGHHD96M2P | 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#1MI7 |
| Ultra-commutative localization by $b_1$ | P9QJ38BKWS | 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 2610.21675#0F01 |
| Ultra-commutative ring spectra | AXPEYPEMBV | 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#9A4Z |
| Ultra-connected | M671ECJHPQ | definition | open | Wikipedia Glossary of general topology#JVU3 |
| Ultra-Log-Concave Measures | 16WWQE81Q6 | 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 2609.23994#LS2Z |
| Ultra-log-concavity | 5VM3VTY9ND | conjecture | 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#JIGC |
| Ultrabarrelled space | TEVMX3KX80 | definition | open | Wikipedia Ultrabarrelled space, Wikidata Q96412185 |
| Ultrabornological space | XXEASXEQMP | definition | open | Wikipedia Ultrabornological space, Wikidata Q96412187 |
| Ultraconnected space | F4VJRWMZHX | definition | open | Wikipedia Ultraconnected space, Wikidata Q7880520 |
| Ultradistribution | ZQ6RDSWQE7 | definition | open | Wikipedia Ultradistribution, Wikidata Q131725517 |
| Ultrafilter | 5XR1B4Z9Z6 | definition | open | Wikipedia List of order theory topics#5JPP, Wikipedia List of general topology topics#ZK0C |
| ultrafilter | 8TR7GEFQC2 | concept | open | Wikidata Q1571831, EoM Ultrafilter, MathWorld Ultrafilter, nLab ultrafilter, Wikipedia Ultrafilter |
| ultrafilter | DW76N4A9G9 | definition | open | Wikipedia Glossary of set theory#8MOI |
| Ultrafilter | X1A1P503HQ | 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 2609.20683#Z5WK |
| Ultrafilter lemma | 9BRDASTF5A | definition | open | Wikipedia List of mathematical proofs#QVF3, Wikipedia List of order theory topics#HL6Z, Wikipedia List of lemmas#ETS5 |
| Ultrafilter on a set | XMXMY4SR1M | definition | open | Wikipedia Ultrafilter on a set, Wikidata Q106671513 |
| Ultrafinitism | RGQ7TMEWFA | definition | open | Wikipedia Ultrafinitism, Wikidata Q2477687 |
| Ultragraph C*-algebra | RX85F81GTG | definition | open | Wikipedia Ultragraph C*-algebra, Wikidata Q104901797 |
| Ultrahyperbolic equation | 1HYC1CKZWQ | definition | open | Wikipedia Ultrahyperbolic equation, Wikidata Q17097801 |
| Ultraintuitionism | 4JT4Y5ACCK | definition | open | Wikipedia List of mathematical logic topics#FONS |
| Ultralimit | 6HKN2MRM6Y | definition | open | Wikipedia Ultralimit, Wikidata Q3548074 |
| Ultrametric | AAFAA9P7ZA | definition | open | Wikipedia Glossary of general topology#MQ4N |
| ultrametric space | H250HT01XR | definition | open | Wikidata Q1897429, MathWorld Ultrametric, Wikipedia Ultrametric space |
| Ultrametric space | PPKHN5A5FY | definition | open | Wikipedia List of general topology topics#GPYY |
| Ultranet (math) | APHHPMRWTZ | unknown | open | Wikipedia Net (mathematics)#PW8J |
| Ultraparallel | PRZYT1T182 | unknown | open | Wikipedia Hyperbolic geometry#CP7R |
| Ultraparallel theorem | 38E9EQK3AW | statement | open | Wikipedia List of mathematical proofs#FJR2 |
| Ultraparallel theorem | KMA9K2S5PT | statement | open | Wikipedia Ultraparallel theorem, Wikidata Q7880612 |
| Ultrapolynomial | 22EGKBY8KG | definition | open | Wikipedia Ultrapolynomial, Wikidata Q110363113 |
| ultrapower | 76J9Y0E0DB | unknown | open | Wikidata Q124222093, MathWorld Ultrapower |
| ultrapower | RQTAZN9KAC | definition | open | Wikipedia Glossary of set theory#HS2A |
| ultraproduct | DSJVMMMH86 | definition | open | Wikipedia Glossary of set theory#TXGX |
| ultraproduct | MVDDHPZV2Y | statement | open | mathlib_1000 Q1535225, Mathlib FirstOrder.Language.Ultraproduct.sentence_realize, Wikidata Q1535225, thousand_plus Q1535225, Wikipedia Łoś' theorem, MathWorld Ultraproduct, nLab ultraproduct, Wikipedia Ultraproduct |
| Ultraproduct | SGW6NNW75M | definition | open | Wikipedia List of algebraic constructions#594A, Wikipedia List of mathematical logic topics#5ESO |
| Ultrastrong topology | 5D34MBXF9F | definition | open | Wikipedia List of topologies#VH0X |
| Ultrastrong topology | QEAD6B284Q | definition | open | Wikipedia Ultrastrong topology, Wikidata Q7880680 |
| UltraViolet | J0EMM8E6S5 | definition | open | Wikipedia UltraViolet (website), Wikidata Q3548057 |
| ultraviolet catastrophe | WH0D1G5QZQ | unknown | open | Wikidata Q1399710, nLab ultraviolet catastrophe |
| Ultraviolet divergence | PJ6GB2VDYC | unknown | open | Wikipedia List of mathematical topics in quantum theory#68YU |
| ultraviolet divergence | PKJCHT14K5 | unknown | open | Wikidata Q3032228, nLab ultraviolet divergence |
| Ultraviolet-tail continuation | 13YB3B8F9H | 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 2610.02714#F0XL |
| ultraweak | F76Z7THY4Z | definition | open | Wikipedia Glossary of functional analysis#JXGJ |
| Ultraweak topology | 75QF7865AM | definition | open | Wikipedia List of topologies#VLXC |
| ultraweak topology | K8KT8H2JA5 | definition | open | Wikidata Q7880722, nLab ultraweak topology, Wikipedia Ultraweak topology |
| UMAC | FQM4V1D226 | definition | open | Wikipedia UMAC (cryptography), Wikidata Q2088868 |
| Umasvati | 9J4Z5RTK27 | unknown | open | Wikipedia List of Indian mathematicians#TG8C |
| Umberto Bottazzini | 6MNZ5DQ5DH | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#E6EB |
| Umberto Bottazzini | R59HPPCWSX | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q2478100, nLab Umberto Bottazzini |
| Umberto Hryniewicz | RZBS5XXVF6 | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#AWJ8 |
| Umberto Puppini | 4WS1M2VWYD | unknown | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#H4SI, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#O5G0 |
| Umberto Zannier | NYKDC7DB3S | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#HK6U |
| Umberto Zannier | ZKEYFX26M6 | topic | open | Wikipedia Umberto Zannier, Wikidata Q15852032 |
| Umbilic exclusion | EP0VGH24W0 | 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#PJ4J |
| Umbilic torus | 7SNG9VP3QJ | definition | open | Wikipedia Umbilic torus, Wikidata Q7881309 |
| umbilical point | D24G65DQZB | definition | open | Wikidata Q3351935, MathWorld UmbilicPoint, Wikipedia Umbilical point |
| umbrae | FYJANH60N2 | definition | open | Wikipedia Glossary of invariant theory#OYHY |
| umbral | NV741EJA17 | definition | open | Wikipedia Glossary of invariant theory#OYIO |
| umbral calculus | 92Y4V0A3B7 | definition | open | Wikidata Q1055314, MathWorld UmbralCalculus, nLab umbral calculus, ProofWiki Definition:Umbral_Calculus, Wikipedia Umbral calculus |
| Umbral calculus | KTZPPD5ES5 | definition | open | Wikipedia Glossary of areas of mathematics#OE1A |
| Umbral calculus | W60SH78N7B | definition | open | Wikipedia List of formal systems#X9Y2 |
| umbral moonshine | JPTP2EA3XP | definition | open | Wikidata Q7881385, nLab umbral moonshine, Wikipedia Umbral moonshine |
| Umbral moonshine | WZRPP9V3Q2 | definition | open | Wikipedia List of unsolved problems in mathematics#ZEU6 |
| Umbrella review | MYH98JH2QQ | definition | open | Wikipedia Umbrella review, Wikidata Q104859001 |
| Umbrella sampling | 9FEN75BMJC | definition | open | Wikipedia Umbrella sampling, Wikidata Q7881414 |
| Umbrella sampling | R0M028QSGH | definition | open | Wikipedia List of numerical analysis topics#EIBT |
| Umbrella sampling | S4JAR0ZY0C | definition | open | Wikipedia List of statistics articles#KKC6 |