| Deltoidal triheptagonal tiling | MGFT7S0B2S | unknown | open | Wikipedia Rhombitriheptagonal tiling#FTUL |
| Deltoidal trihexagonal tiling | 441YBSYSAV | unknown | open | Wikipedia Rhombitrihexagonal tiling#WAAG |
| Delzant's theorem | QCQF34TH0Q | statement | open | Wikipedia Delzant's theorem, Wikidata Q16942395 |
| DEM13M2X83 | DEM13M2X83 | 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 2609.21680#S5ZN |
| Demagnetisation | WZQF5S5M17 | unknown | open | Wikipedia Magnetization#492E |
| Demailly | J5R2ZDKN2Q | 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 2609.28411#H5RS |
| Demailly--P\u{a}un mass concentration | AM0GCHCKZN | 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 2609.28411#FR13 |
| Demand curve | TJRCXEAAS2 | unknown | open | Wikipedia List of curves#Z68A |
| Demand forecasting | 62B3JE513N | definition | open | Wikipedia List of statistics articles#40TL |
| Demand forecasting | CGD60BHZN0 | definition | open | Wikipedia Demand forecasting, Wikidata Q3409300 |
| Demand optimization | K488Q6Q11P | unknown | open | Wikipedia List of numerical analysis topics#OGE7 |
| Demand with a continuous instrument and a continuous treatment | AS6MVAENBB | 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 2609.40156#GPDT |
| Demand with covariates | QDEX4RHF0S | 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 2609.40156#AM4I |
| DeMarco-Mavraki | M0V15S4C8R | 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 2610.15169#HWBQ |
| Demazure | NQRVZY1XFR | definition | open | Wikipedia Glossary of representation theory#G6G0 |
| Demazure character formula | 419KA2GNJ1 | statement | open | Wikipedia Demazure module#JBI6 |
| Demazure conjecture | MG4G559CAE | statement | open | Wikipedia List of unsolved problems in mathematics#QKKF |
| Demazure conjecture | RKZR87NNQZ | statement | open | Wikipedia Demazure conjecture, Wikidata Q5255107 |
| Demazure module | 4BVEEGWXJ1 | definition | open | Wikipedia Demazure module, Wikidata Q5255108 |
| Demeter Krupka | XVB6D1931W | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q95152095, nLab Demeter Krupka |
| Demetra+ | 2KKKRXE0Z6 | definition | open | Wikipedia Demetra+, Wikidata Q5255200 |
| Demetrice Martin | NM2K8GZANP | unknown | open | Wikipedia List of University of California, Los Angeles people#BWKX |
| Demetrios Christodoulou | ANWV20ECJJ | topic | open | Wikipedia List of people by Erdős number#87PD, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#18C8, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#WXP9 |
| Demetrios Christodoulou | KV0K6JTSB9 | topic | open | Wikipedia Demetrios Christodoulou, Wikidata Q687024 |
| Demetrios Christodoulou | MHCM9GBXNT | topic | open | Wikipedia List of contributors to general relativity#9AVX |
| Demetrios Christodoulou | MKGSF4GM83 | topic | open | Wikipedia List of Greek mathematicians#1D2Y |
| Demetrios Magiros | 7GTBMX2DM2 | topic | open | Wikipedia Demetrios Magiros, Wikidata Q37735745 |
| Demidov Prize | 2S0WCSRKGH | definition | open | Wikipedia Demidov Prize, Wikidata Q1185606 |
| Demihypercube | 4EZK0MHPN0 | object | open | Wikipedia List of mathematical shapes#FNU9, Wikipedia List of polygons, polyhedra and polytopes#AVKA |
| Demihypercube | 8PAA3G6M6T | object | open | Wikipedia Demihypercube, Wikidata Q5255350 |
| Deming regression | 9J4JATTCCV | definition | open | Wikipedia Deming regression, Wikidata Q5255370 |
| Deming regression | D0NQZ1PV5J | definition | open | Wikipedia List of statistics articles#BW1Z |
| Deming System | 7DEK8T4FNA | unknown | open | Wikipedia W. Edwards Deming#4K3V |
| Deming, W. Edwards | QTSDE05YR2 | topic | open | Wikipedia List of statisticians#P1LE |
| demiregular tiling | XG8072S0TD | definition | open | Wikidata Q15919504, MathWorld DemiregularTessellation, Wikipedia Demiregular tiling |
| Demitesseractic symmetry | TJBCCG5VG9 | unknown | open | Wikipedia Point groups in four dimensions#PL17 |
| DeMix | WXFGVXHQHB | definition | open | Wikipedia DeMix, Wikidata Q55609206 |
| Demlo number | FA69P8A6WV | unknown | open | Wikipedia Repunit#YW7Z |
| Demlo number | J03AAPYKP4 | unknown | open | Wikidata Q30748332, MathWorld DemloNumber, OEIS A002477 |
| Demo effect | RMYTDQYFH4 | unknown | open | Wikipedia List of computer graphics and descriptive geometry topics#GUBG |
| Democratic Republic of the Congo | ZXDPE3M242 | unknown | open | Wikipedia List of countries by past and projected future population#4CCZ |
| Democritus | 6HPPGXWS72 | topic | out_of_scope (a person, not an item of mathematics) | Wikidata Q41980, ProofWiki Mathematician:Democritus, Wikipedia Democritus |
| Democritus | M4JTW3JSNF | topic | open | Wikipedia List of Greek mathematicians#QK8M |
| Demographic crisis of Ukraine | 351W3TX07E | unknown | open | Wikipedia Demographics of Ukraine#45JH |
| Demographic economics | ERT32AA1BV | definition | open | Wikipedia Demographic economics, Wikidata Q3044431 |
| Demographic history of Armenia | 4N30900Z8W | unknown | open | Wikipedia Demographics of Armenia#64XA |
| Demographic history of Australia | DSKGHKJV9E | unknown | open | Wikipedia Demographics of Australia#DA3E |
| Demographic history of Germany | AEMPVVV0R5 | unknown | open | Wikipedia Demographics of Germany#RT2C |
| Demographic history of North Macedonia | E32QB2RSPQ | definition | open | Wikipedia Demographic history of North Macedonia, Wikidata Q16829331 |
| Demographic history of Scotland | 9FWJNR2N7A | definition | open | Wikipedia Demographic history of Scotland, Wikidata Q16843496 |
| Demographic history of the world | HMBK3XX53Q | unknown | open | Wikipedia Demographics of the world#2W2D |
| Demographic statistics | 67RSHZ70VW | definition | open | Wikipedia Demographic statistics, Wikidata Q1965979 |
| Demographics | GJAGQG4BWY | topic | open | Wikipedia List of statistics articles#HIKQ |
| Demographics of Afghanistan | MGKBQ96Q98 | definition | open | Wikipedia Demographics of Afghanistan, Wikidata Q1075999 |
| Demographics of Africa | GE4X6216WX | definition | open | Wikipedia Demographics of Africa, Wikidata Q3037005 |
| Demographics of Aguascalientes | CN91TCYYPQ | definition | open | Wikipedia Demographics of Aguascalientes, Wikidata Q5255974 |
| Demographics of Albania | 2DF66X8149 | definition | open | Wikipedia Demographics of Albania, Wikidata Q583150 |
| Demographics of Alderney | 5AXMVM8YE8 | topic | open | Wikipedia Demographics of Alderney, Wikidata Q85850444 |
| Demographics of Andorra | D92NYVP3FY | definition | open | Wikipedia Demographics of Andorra, Wikidata Q2087350 |
| Demographics of Armenia | RB3G9WQY83 | definition | open | Wikipedia Demographics of Armenia, Wikidata Q2382992 |
| Demographics of Asia | KWM8F2532V | definition | open | Wikipedia Demographics of Asia, Wikidata Q3044208 |
| Demographics of Australia | R6R42PQAG0 | definition | open | Wikipedia Demographics of Australia, Wikidata Q2088388 |
| Demographics of Bangladesh | SJMZAF076X | definition | open | Wikipedia Demographics of Bangladesh, Wikidata Q2471577 |
| Demographics of Bulgaria | X363YPCPR1 | definition | open | Wikipedia Demographics of Bulgaria, Wikidata Q1145659 |
| Demographics of Canada | 71MED0JYC5 | definition | open | Wikipedia Demographics of Canada, Wikidata Q2492796 |
| Demographics of China | 553ZV4VEK5 | definition | open | Wikipedia Demographics of China, Wikidata Q1981379 |
| Demographics of Cologne | VGPZ7ER1F1 | definition | open | Wikipedia Demographics of Cologne, Wikidata Q1309813 |
| Demographics of Europe | 9JQ6NXGX4S | definition | open | Wikipedia Demographics of Europe, Wikidata Q1067887 |
| Demographics of Gaza | DM8YD64ACT | unknown | open | Wikipedia Demographics of Palestine#90D5 |
| Demographics of Generation Alpha | 2D1QZDAQ7H | definition | open | Wikipedia Demographics of Generation Alpha, Wikidata Q115829133 |
| Demographics of Germany | KJG8DRQZKQ | definition | open | Wikipedia Demographics of Germany, Wikidata Q327213 |
| Demographics of Glasgow | 749SNR3HAN | definition | open | Wikipedia Demographics of Glasgow, Wikidata Q21997529 |
| Demographics of Greece | BFE3THNNQ7 | definition | open | Wikipedia Demographics of Greece, Wikidata Q958485 |
| Demographics of Hamburg | 2A6QKCB9E1 | definition | open | Wikipedia Demographics of Hamburg, Wikidata Q318909 |
| Demographics of Holyoke, Massachusetts | HZ9ZX2E919 | definition | open | Wikipedia Demographics of Holyoke, Massachusetts, Wikidata Q85756335 |
| Demographics of India | 1XE9619S7P | definition | open | Wikipedia Demographics of India, Wikidata Q996189 |
| Demographics of Istanbul | GN4E4WJPKE | definition | open | Wikipedia Demographics of Istanbul, Wikidata Q85756341 |
| Demographics of Leicester | RWHSA8SC8C | definition | open | Wikipedia Demographics of Leicester, Wikidata Q22004519 |
| Demographics of Luton | JQQ80X0B13 | definition | open | Wikipedia Demographics of Luton, Wikidata Q20979074 |
| Demographics of Mexico | M8SNMV7EQR | definition | open | Wikipedia Demographics of Mexico, Wikidata Q615428 |
| Demographics of Millenials | EHFZPEN7TM | unknown | open | Wikipedia Millennials#N3P8 |
| Demographics of New Caledonia | N5Q7N1EB15 | definition | open | Wikipedia Demographics of New Caledonia, Wikidata Q4313703 |
| Demographics of North Macedonia | QYWVDM6ZRN | definition | open | Wikipedia Demographics of North Macedonia, Wikidata Q1751505 |
| Demographics of Northern Ireland | Y7BFKYS27F | definition | open | Wikipedia Demographics of Northern Ireland, Wikidata Q2619323 |
| Demographics of Oceania | 58YNWG08J6 | definition | open | Wikipedia Demographics of Oceania, Wikidata Q3382783 |
| Demographics of Pakistan | MJT6DGBH6D | definition | open | Wikipedia Demographics of Pakistan, Wikidata Q679314 |
| Demographics of Palestine | TPC7ZS4KRJ | definition | open | Wikipedia Demographics of Palestine, Wikidata Q5256116 |
| Demographics of Penang | 1G9S7ZMBJX | definition | open | Wikipedia Demographics of Penang, Wikidata Q129642735 |
| Demographics of Portugal | 8HDHWWGN41 | definition | open | Wikipedia Demographics of Portugal, Wikidata Q1981371 |
| Demographics of Rotselaar | 1S8YE7P2H2 | definition | open | Wikipedia Demographics of Rotselaar, Wikidata Q5256068 |
| Demographics of Russia | FNXNZCH3QX | definition | open | Wikipedia Demographics of Russia, Wikidata Q4224 |
| Demographics of Sabah | T8GR3BVSYC | definition | open | Wikipedia Demographics of Sabah, Wikidata Q48726573 |
| Demographics of Samoa | GF9JD5GZ37 | definition | open | Wikipedia Demographics of Samoa, Wikidata Q3044344 |
| Demographics of Sarawak | KKZ8WPYZXS | definition | open | Wikipedia Demographics of Sarawak, Wikidata Q5256076 |
| Demographics of South Africa | QH30TKZPV6 | definition | open | Wikipedia Demographics of South Africa, Wikidata Q1185967 |
| Demographics of South America | Y30E6Y00NX | definition | open | Wikipedia Demographics of South America, Wikidata Q5256080 |
| Demographics of Sub-Saharan Africa | GQ6YG8BN18 | unknown | open | Wikipedia Demographics of Africa#ZGD8 |
| Demographics of Sudan | 5ZR58C8655 | definition | open | Wikipedia Demographics of Sudan, Wikidata Q1851957 |
| Demographics of Tanzania | NRTCWQAGG7 | definition | open | Wikipedia Demographics of Tanzania, Wikidata Q2667349 |
| Demographics of Tees Valley | WAH47F6YK8 | definition | open | Wikipedia Demographics of Tees Valley, Wikidata Q124119545 |