| Happy Family (group theory) | 2HZ35ZDWWH | unknown | open | Wikipedia Sporadic group#NM7K |
| happy number | 2652WWEB70 | definition | open | Wikidata Q44535, MathWorld HappyNumber, OEIS A007770, Wikipedia Happy number |
| Happy Planet Index | RX91M7Y6TQ | definition | open | Wikipedia Happy Planet Index, Wikidata Q612956 |
| HAQ4NS26XQ | HAQ4NS26XQ | 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 2411.17227#HDYM |
| HAQ7SJ73VG | HAQ7SJ73VG | 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 2609.33953#HT2J |
| HAQWVQD41T | HAQWVQD41T | 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 2210.11778#2DY7 |
| HAQX4MPN09 | HAQX4MPN09 | exercise | open | open_logic content/first-order-logic/completeness/compactness-direct.tex#prob-2 |
| Harada–Norton group | DW88ABYFMY | object | open | Wikidata Q3117684, MathWorld Harada-NortonGroup, Wikipedia Harada–Norton group |
| Harada–Norton group | NDZ1SJVP6A | object | open | Wikipedia List of mathematical examples#M905 |
| Harald Bergström | D385TSBPDT | topic | open | Wikipedia Harald Bergström, Wikidata Q1584416 |
| Harald Bergström | R869J29JDD | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#KX0I, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#RZ14 |
| Harald Bohr | 3X2A583566 | topic | open | Wikipedia Harald Bohr, Wikidata Q310009 |
| Harald Bohr | HHGKHPWDA5 | topic | open | Wikipedia List of Jewish mathematicians#BLWC |
| Harald Bohr | Q7DY5GHQE2 | topic | open | Wikipedia List of people by Erdős number#78JS, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#7XII, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#NPM1, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#P5HJ |
| Harald Bohr | XNT4C7K4QY | topic | open | Wikipedia List of mathematicians born in the 19th century#DJQZ |
| Harald Cramér | 3DT5QBZAM7 | topic | open | Wikipedia List of actuaries#90ED |
| Harald Cramér | A01XS4E387 | topic | open | Wikipedia List of mathematical probabilists#G3CD |
| Harald Cramér | JAM8DPJTSY | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#ZK0G, Wikipedia List of fellows of the American Statistical Association#WY32 |
| Harald Cramér | ZXHM9J1PZJ | topic | open | Wikipedia Harald Cramér, Wikidata Q471777 |
| Harald Fritzsch | HMJKNDWNN0 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q105561, nLab Harald Fritzsch |
| Harald Ganzinger | PVP9M62047 | topic | open | Wikipedia Harald Ganzinger, Wikidata Q92690 |
| Harald Garcke | HMEHXWF8JT | topic | open | Wikipedia Harald Garcke, Wikidata Q21325799 |
| Harald Garcke | VB9N8JSWG5 | topic | open | Wikipedia List of German mathematicians#WLBV |
| Harald Grobner | HCS43A8GM1 | topic | open | Wikipedia Harald Grobner, Wikidata Q24653595 |
| Harald Helfgott | 1PHQXMRZXM | unknown | open | Wikipedia List of people by Erdős number#HFL6, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#N7ZT |
| Harald Niederreiter | K9S6VHWEBJ | topic | open | Wikipedia List of people by Erdős number#8MSW, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#RUQ0 |
| Harald Niederreiter | WHSTR8546P | topic | open | Wikipedia Harald Niederreiter, Wikidata Q89633 |
| Harald Wergeland | BWS4X3E6PA | unknown | open | Wikipedia List of people by Erdős number#0WMT |
| Harald Wohlrapp | YW73WJ8QTF | topic | open | Wikipedia Harald Wohlrapp, Wikidata Q92312 |
| Haran's diamond theorem | QGDVVS001T | statement | open | Wikipedia Haran's diamond theorem, Wikidata Q5654097 |
| Harborth graph | BJA5E5J5ER | unknown | open | Wikidata Q3115499, House of Graphs 1144, MathWorld HarborthGraph |
| Harborth's conjecture | 4KMYCT7B2F | conjecture | open | Wikipedia Harborth's conjecture, Wikidata Q21002406 |
| Harborth's conjecture | H0CDCFEAK4 | conjecture | open | Wikipedia List of unsolved problems in mathematics#F7QG |
| Harch, Bronwyn | VGDCJJS8NP | unknown | open | Wikipedia List of statisticians#LX9H |
| Harcourt's theorem | SE2C7NKG0N | statement | open | Wikipedia Harcourt's theorem, Wikidata Q17020898 |
| Harcourt, Alison | GZZAZSJYW3 | topic | open | Wikipedia List of statisticians#RCVO |
| Hard | 66GGQQTAQ9 | exercise | open | lebl_ra ch-riemann.tex#exercise-20 |
| Hard | A7AV8WR6WT | exercise | open | lebl_ra ch-real-nums.tex#exercise-32 |
| Hard | D0J86RSKP2 | exercise | open | lebl_scv scv.tex#exercise-262 |
| Hard | HE3HC0HNQS | exercise | open | lebl_ra ch-one-dim-ints-sv.tex#exercise-28 |
| Hard | M4RVKH6H74 | exercise | open | lebl_ra ch-one-dim-ints-sv.tex#exercise-25 |
| Hard | NWA3RY43PV | exercise | open | lebl_ra ch-real-nums.tex#exercise-31 |
| Hard | NZ4R2YZ7RX | exercise | open | lebl_ra ch-real-nums.tex#exercise:rootexistshard |
| Hard | Z7GNFHHD5V | exercise | open | lebl_ra ch-seq-funcs.tex#exercise:dinisthm |
| Hard analysis | SB5X4MM6AW | definition | open | Wikipedia Glossary of areas of mathematics#PA5I |
| Hard discrepancy at a near-endpoint Gaussian scale | CYCB5CW0FT | 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#6WDC |
| Hard feasibility | R1QZP2EPQG | 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 2610.12456#9KS5 |
| Hard fork | SSQBYPNYNK | unknown | open | Wikipedia Fork (blockchain)#0L6F |
| Hard hexagon model | W1PY18H228 | concept | open | Wikidata Q17020934, MathWorld HardHexagonEntropyConstant, Wikipedia Hard hexagon model |
| Hard Lefschetz decomposition | PGYRGQDTKV | statement | open | Wikipedia Kähler identities#2DZA |
| Hard Lefschetz theorem | KCPMRS3W7J | statement | open | Wikipedia Lefschetz hyperplane theorem#UNL6 |
| Hard list-flip transition | PM556EQTHA | 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 2610.12456#W1QQ |
| Hard normalized-cut specialization | NTCPPWRARR | 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#0T7S |
| Hard objective and comparison oracle | 8M40X6PC6E | 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 2610.01843#MTYQ |
| Hard spheres | CT2ZF3V4GE | definition | open | Wikipedia Hard spheres, Wikidata Q2435125 |
| Hard vector balancing in joint convex order | EPPEC93D2V | 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#GF79 |
| Hard-chain properties | A2QAK5Y38N | 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 2610.01843#2JDB |
| Hard-core free energy | GJ5W3KF38X | 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 2609.39699#2LKP |
| Hard-core lower bound | PR1XTM2GV8 | 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 2609.39699#HVPU |
| Hard-core predicate | 9H5SS4YPQ1 | definition | open | Wikipedia Hard-core predicate, Wikidata Q2355810 |
| Hard-margin linear classification | T00YXJ95H6 | 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 2610.10519#64A9 |
| Hard-margin root-$Q$ lower bound | TR8RM4YDFP | 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 2610.21363#ATI0 |
| Hard-wall transition and hard-edge tail | VJ3QD9GEH5 | 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 2609.25307#ZEWA |
| harder | 5N6FJ69P1H | exercise | open | lebl_diffyqs ch-first-order-ode.tex#exercise-8 |
| Harder–Narasimhan stratification | 1T7JJAFC27 | definition | open | Wikipedia Harder–Narasimhan stratification, Wikidata Q60790229 |
| Hardin, Garrett | MYECQ3HN5X | unknown | open | Wikipedia List of statisticians#0WE2 |
| Hardin, Jo | SJP1WQVKKC | topic | open | Wikipedia List of statisticians#H8C5 |
| Hardness of approximating the common entropy | 8XWZRC3MG3 | 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 2610.15402#7AJR |
| Hardness of approximation | 6BT4AR00AG | definition | open | Wikipedia Hardness of approximation, Wikidata Q5656275 |
| Hardness of approximation | JDKK9EFS1V | definition | open | Wikipedia List of numerical analysis topics#M0FE |
| Hardness of incumbent improvement | 5S67RWBXM1 | 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 2610.02528#BDQV |
| Hardness of the common entropy | 1AM79VYAZH | 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 2610.15402#475U |
| Hardness of Wyner's common information | GC9RCJ1V4T | 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 2610.15402#TIFC |
| Hardness under autoregressive reparametrization | HPH7DY5CFH | 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 2610.02528#P8WR |
| Hardt-Simon (1979 | BN349P64MA | 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 2609.26701#29MF |
| Hardware security | XK1ERGPY4E | definition | open | Wikipedia Hardware security, Wikidata Q30325435 |
| Hardware-based encryption | NSGSQHTHGV | definition | open | Wikipedia Hardware-based encryption, Wikidata Q4068149 |
| Hardware-based full disk encryption | 3FNZKEBYS5 | definition | open | Wikipedia Hardware-based full disk encryption, Wikidata Q17081362 |
| Hardy and Littlewood's Conjecture F | 8WEWYZ7N3Q | statement | open | Wikipedia Ulam spiral#VE0H |
| Hardy distribution | JD5YMZQP1Q | definition | open | Wikipedia Hardy distribution, Wikidata Q120497958 |
| Hardy distribution | ZM30QHYD4N | definition | open | Wikipedia List of probability distributions#WZ12 |
| Hardy field | DPC832PRH0 | definition | open | Wikipedia Hardy field, Wikidata Q17021030 |
| Hardy hierarchy | AXZV66VW64 | definition | open | Wikipedia Hardy hierarchy, Wikidata Q5656649 |
| Hardy McLain | KGAQEKV9SW | unknown | open | Wikipedia List of University of California, Los Angeles people#S2V5 |
| Hardy progeny of the North | FDG533NCAV | definition | open | Wikipedia Hardy progeny of the North, Wikidata Q56063376 |
| Hardy space | 88ZH31ZGBC | definition | open | Wikipedia List of Banach spaces#VL2N |
| Hardy space | SYQSNYGF8Y | definition | open | Wikipedia Glossary of real and complex analysis#DYAH |
| Hardy space | WG79CAP4WM | definition | open | Wikipedia List of vector spaces in mathematics#61I8, Wikipedia List of complex analysis topics#XF2R, Wikipedia List of functional analysis topics#DA64, Wikipedia List of Fourier analysis topics#ZNX3 |
| Hardy space | XM2T5TJYFE | concept | open | Wikidata Q1585233, EoM Hardy_classes, MathWorld HardySpace, Wikipedia Hardy space |
| Hardy space conjugate function | 8M5T1HDY29 | unknown | open | Wikipedia Hardy space#FFHW |
| Hardy's conjecture | CPKJ9X561R | 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 2610.21730#UO8O |
| Hardy's inequality | K7VSR0JVKA | statement | open | Wikipedia List of inequalities#N1AX |
| Hardy's inequality | S7K2MYA6FY | statement | open | Wikidata Q944228, MathWorld HardysInequality, Wikipedia Hardy's inequality |
| Hardy's theorem | 6TZWM26QWR | statement | open | Wikipedia List of theorems#DUNI |
| Hardy's theorem | VYGVXBSAXH | statement | open | Wikipedia List of complex analysis topics#65V9 |
| Hardy's theorem | YMQ6MC13V9 | statement | open | mathlib_1000 Q4455037, Wikidata Q4455037, thousand_plus Q4455037, Wikipedia Hardy's theorem |
| Hardy's uncertainty principle | 211PQ71S66 | statement | open | Wikipedia Uncertainty principle#8YMZ |
| Hardy--Littlewood--Chowla | BHZ7W4HJRG | 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 2610.20242#17MV |
| Hardy-Littlewood maximal inequality | NJNDB7BYGS | definition | open | Wikipedia Glossary of real and complex analysis#Z067 |
| Hardy–Hille formula | TJRHH9NTXB | statement | open | Wikipedia Laguerre polynomials#IUQY |