| Ionel--Parker | VQ8XC4JFZP | 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 2610.10828#O6W9 |
| Ionescu--Klainerman | N01JF9CHCS | 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 2609.23872#93LI |
| Ionescu-Tulcea theorem | 6VP9Q9F6DD | statement | open | mathlib_1000 Q25378690, Mathlib ProbabilityTheory.Kernel.traj, Wikidata Q25378690, thousand_plus Q25378690, Wikipedia Ionescu-Tulcea theorem |
| Ionescu-Tulcea theorem | BH8WK8Q12A | statement | open | Wikipedia List of theorems#44AB |
| Ionic equation | 5G6HRMR257 | unknown | open | Wikipedia Chemical equation#6091 |
| Ionica Smeets | T9MGJDF2ZR | topic | open | Wikipedia Ionica Smeets, Wikidata Q2649422 |
| Iosif Gikhman | EC73PH8Z2P | topic | open | Wikipedia Iosif Gikhman, Wikidata Q4139049 |
| Iosif Gikhman | YSWR2T9XK5 | topic | open | Wikipedia List of mathematical probabilists#GMA8 |
| Iosif Pogrebyssky | 9NS7K23H5N | unknown | open | Wikipedia List of Ukrainian Jews#RTDF |
| Iosif Shklovsky | Z00WYK9Q7Y | unknown | open | Wikipedia List of Ukrainian Jews#EQLK |
| Iosif Vitebskiy | 85TBX362QG | unknown | open | Wikipedia List of Ukrainian Jews#2OV5 |
| Iosif Vorovich | J8ZS4HZT33 | topic | open | Wikipedia Iosif Vorovich, Wikidata Q4125281 |
| Iossif Dorfman | X91P2QG6AE | unknown | open | Wikipedia List of Ukrainian Jews#VZNP |
| iota | RN514SC6YK | unknown | out_of_scope (a notation: the notation register holds it (corpus spec K10.4)) | Wikidata Q14399, ProofWiki Symbols:Greek/Iota |
| IP | H7QGZSF9R7 | definition | open | Wikipedia IP (complexity), Wikidata Q5973158 |
| IP set | MZ376XS66X | definition | open | Wikipedia List of exceptional set concepts#A52M |
| IP set | NC2AEYB38R | statement | open | mathlib_1000 Q1566341, Mathlib Hindman.FP_partition_regular, Wikidata Q1566341, thousand_plus Q1566341, Wikipedia Hindman's theorem, Wikipedia IP set |
| Ipse dixit | 6WPNZK37ZR | definition | open | Wikipedia Ipse dixit, Wikidata Q760901 |
| Ipso facto | NZCR9SHPQK | definition | open | Wikipedia Ipso facto, Wikidata Q138653 |
| Ipso jure | JBXD25JHK2 | definition | open | Wikipedia Ipso jure, Wikidata Q139717 |
| Ipsos | S9N4FTRBMR | unknown | open | Wikipedia List of polling organizations#6D2F, Wikipedia List of polling organizations#B7SX, Wikipedia List of polling organizations#YW4Q |
| Ipsos Australia | NZMBBM1HSJ | unknown | open | Wikipedia List of polling organizations#C4WO |
| Ipsos MORI | H65TTMMVDC | unknown | open | Wikipedia List of polling organizations#B6LX |
| Ipsos-Reid | M7ACFPZP31 | unknown | open | Wikipedia List of polling organizations#41NT |
| IPUMS | 5JE3FSF072 | definition | open | Wikipedia IPUMS, Wikidata Q5973128 |
| IQR | EEQP4E7J3N | definition | open | Wikipedia Quartile coefficient of dispersion#93WJ |
| IQR | ZXQCZYDAXD | definition | open | Wikipedia Midhinge#YJV7 |
| Ira Gessel | 82DJAQZJ4Y | topic | open | Wikipedia Ira Gessel, Wikidata Q29431806 |
| Ira Gessel | WRX6SRN3T0 | topic | open | Wikipedia List of people by Erdős number#U4XD |
| Ira Longini | G592MJFP6B | unknown | open | Wikipedia List of fellows of the American Statistical Association#2ZE9 |
| Iran | T1WGFZM6P8 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q794, ProofWiki Mathematician:Mathematicians/Sorted_By_Nation/Iran |
| Iranian Mathematical Society | V9HSFBSY0A | definition | open | Wikipedia List of mathematical societies#8LYB |
| Iranian Mathematical Society | VPZJHN3M9Y | definition | open | Wikipedia Iranian Mathematical Society, Wikidata Q5701834 |
| Iraq | 1FPW2Y73N8 | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q796, ProofWiki Mathematician:Mathematicians/Sorted_By_Nation/Iraq |
| Iraqi block cipher | JR8XXV09T2 | definition | open | Wikipedia Iraqi block cipher, Wikidata Q3801848 |
| Ireland | QPHEN6Q35X | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q27, ProofWiki Mathematician:Mathematicians/Sorted_By_Nation/Ireland |
| Irena Lasiecka | 13GDKMBGFE | topic | open | Wikipedia Irena Lasiecka, Wikidata Q18708380 |
| Irena Lasiecka | NJNQ29CBYM | topic | open | Wikipedia List of people by Erdős number#4FWZ |
| Irena Peeva | 3PVRTK8NQS | topic | open | Wikipedia Irena Peeva, Wikidata Q17285695 |
| Irena Peeva | WMAGW33RA1 | topic | open | Wikipedia List of people by Erdős number#4Z02, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#75Z8 |
| Irena Swanson | 1VTR46XH5J | topic | open | Wikipedia Irena Swanson, Wikidata Q58416624 |
| Irene Barnes Taeuber | Y629ZG4B8Y | unknown | open | Wikipedia List of fellows of the American Statistical Association#KN7Q |
| Irene Fonseca | 6H2273MVH5 | topic | open | Wikipedia List of people by Erdős number#ZPMF, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#FO0W |
| Irene Fonseca | YKDJX0YF5K | topic | open | Wikipedia Irene Fonseca, Wikidata Q11100324 |
| Irene Hess | 2NYDE6SV37 | topic | open | Wikipedia Irene Hess, Wikidata Q42304896 |
| Irene Hess | G4DSQZZHZB | topic | open | Wikipedia List of fellows of the American Statistical Association#TWMO |
| Irene M. Gamba | 48F3Q4YNCJ | topic | open | Wikipedia List of people by Erdős number#NR4N |
| Irene M. Gamba | T6YDKC4DMA | topic | open | Wikipedia Irene M. Gamba, Wikidata Q18705193 |
| Irene Montie | M5H42FXR05 | topic | open | Wikipedia Irene Montie, Wikidata Q60455143 |
| Irene Moroz | W0ZVCZCSG4 | topic | open | Wikipedia Irene Moroz, Wikidata Q57624489 |
| Irene Mulvey | PNCK8Q35BB | topic | open | Wikipedia Irene Mulvey, Wikidata Q100282677 |
| Irene Sabadini | 2Y5TAZFR9Z | topic | open | Wikipedia Irene Sabadini, Wikidata Q93428106 |
| Irene Sciriha | 7AXAB4467D | topic | open | Wikipedia Irene Sciriha, Wikidata Q86756309 |
| Irina Mitrea | EM2AD5DZAP | topic | open | Wikipedia List of people by Erdős number#KYIK |
| Irina Mitrea | QSHTZHXDMT | topic | open | Wikipedia Irina Mitrea, Wikidata Q19564363 |
| Irina Shevtsova | 65HPCXM2FR | topic | open | Wikipedia Irina Shevtsova, Wikidata Q54141962 |
| Irina Tezaur | CEARXB0024 | topic | open | Wikipedia Irina Tezaur, Wikidata Q59753055 |
| Iris flower data set | 77AKQ3W89Z | definition | open | Wikipedia List of statistics articles#KL0X |
| Iris flower data set | N6B01HJJ9X | definition | open | Wikipedia Iris flower data set, Wikidata Q4203254 |
| Iris Runge | GSZQFSGB53 | topic | open | Wikipedia Iris Runge, Wikidata Q1672752 |
| Iris Runge | XTY3T7YD13 | topic | open | Wikipedia List of German mathematicians#MTR8 |
| Irish Institute | DQQXM3JMGX | unknown | open | Wikipedia List of research centers at Boston College#0D4W |
| Irish Mathematical Society | GSBZKNHZ83 | unknown | open | Wikipedia List of mathematical societies#FYMJ |
| Irish Statistical Association | 3DC3Y2DV0Y | definition | open | Wikipedia Irish Statistical Association, Wikidata Q85770002 |
| Irish Statistical Association | TCX2S9MCR0 | definition | open | Wikipedia List of academic statistical associations#ZZE3 |
| Irit Dinur | D224TAXRWH | unknown | open | Wikipedia List of people by Erdős number#UCT3, Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#Q813 |
| Iritani | EYXDG0H0MH | 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 2610.10828#RHZM |
| Irith Pomeranz | HC3VMC2DCJ | unknown | open | Wikipedia List of people by Erdős number#VC4K |
| Irmak {, Shackleton | AQAXJP6VRH | 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 2610.12054#E51G |
| Irmgard Flügge-Lotz | XW44WP589A | topic | open | Wikipedia Irmgard Flügge-Lotz, Wikidata Q91675 |
| Irmgard Lotz | 771S17Y4QQ | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#61HQ |
| iron | DNC3T1G2RC | definition | open | Wikidata Q677, ProofWiki Definition:Iron |
| Iron Finance | QYEXWZW2G6 | definition | open | Wikipedia Iron Finance, Wikidata Q131553807 |
| iron-54 | E3AJ4Z30RX | definition | open | Wikidata Q2696892, ProofWiki Definition:Iron/54 |
| iron-55 | A7P57SHGW0 | definition | open | Wikidata Q2015910, ProofWiki Definition:Iron/55 |
| iron-56 | 83VPWXV1VV | definition | open | Wikidata Q1052454, ProofWiki Definition:Iron/56 |
| iron-57 | 8PH8KY0V71 | definition | open | Wikidata Q14744877, ProofWiki Definition:Iron/57 |
| iron-58 | HJ6FJ3W0K8 | definition | open | Wikidata Q2704780, ProofWiki Definition:Iron/58 |
| iron-59 | 1ZNHMA1W58 | definition | open | Wikidata Q18844934, ProofWiki Definition:Iron/59 |
| iron-60 | H5TMPDTK29 | definition | open | Wikidata Q1950935, ProofWiki Definition:Iron/60 |
| Irony, Telba | Y06ZKYQHKC | topic | open | Wikipedia List of statisticians#2V0U |
| irradiation illusion | W6WNCZ39DK | unknown | open | Wikidata Q1673175, MathWorld IrradiationIllusion |
| irrational | 1XJZ7WNQCS | definition | open | Wikipedia List of unsolved problems in mathematics#5B9S |
| Irrational base discrete weighted transform | 5MP5D1D9N7 | definition | open | Wikipedia Irrational base discrete weighted transform, Wikidata Q6073530 |
| Irrational base discrete weighted transform | TVFZRPNTWE | definition | open | Wikipedia List of transforms#26HC, Wikipedia List of numerical analysis topics#633M, Wikipedia List of harmonic analysis topics#GLPF |
| Irrational cable on a torus | 59REXGVQ3F | definition | open | Wikipedia List of examples in general topology#QPO2 |
| Irrational fraction | 5T5893RPN3 | unknown | open | Wikipedia Algebraic fraction#20XG |
| irrational number | CZQDZ9W7QP | definition | node (a node has the same name as the row) | Wikidata Q607728, EoM Irrational_number, Mathlib Irrational, MathWorld IrrationalNumber, Wikipedia Irrational number |
| Irrational number | JFXWAWBGQG | definition | open | Wikipedia List of mathematical proofs#84J0, Wikipedia List of number theory topics#3WRK |
| Irrational number | ZCG0Y9F717 | definition | open | Wikipedia List of types of numbers#S61J |
| Irrational numbers in medieval Islam | QZM8BR1AYA | unknown | open | Wikipedia Mathematics in the medieval Islamic world#ONRT |
| Irrational rotation | 31YMJMWND7 | object | open | Wikipedia Irrational rotation, Wikidata Q6073537 |
| irrational torus, f\/irst construction | 1R3DY452RN | 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 1408.1555#OV01 |
| irrational torus, second construction | J0QTYV8T2C | 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 1408.1555#LCI5 |
| Irrational winding of a torus | GHDBT84FCX | definition | open | Wikipedia List of topologies#RR42 |
| irrationality measure | E9A89WDYMG | definition | open | Wikidata Q14917576, MathWorld IrrationalityMeasure, Wikipedia Irrationality measure |
| Irrationality measure | EERC9W51NN | definition | open | Wikipedia List of number theory topics#38LJ |
| Irrationality sequence | 8Z68E96V57 | object | open | Wikidata Q17079511, MathWorld IrrationalitySequence, Wikipedia Irrationality sequence |
| Irreducibility | 3ZZ9VY58EG | 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 2609.33590#6G9U |
| Irreducibility | 7VDWVQ0YNA | definition | open | Wikipedia Irreducibility (mathematics), Wikidata Q1827342 |