| Trimean | 4MTRDZCTAR | definition | open | Wikipedia List of statistics articles#A1RI |
| trimean | 6JE7RWFHCB | definition | open | Wikidata Q7842161, MathWorld Trimean, Wikipedia Trimean |
| trimmed estimator | 6T77Z2JWZ4 | definition | open | Wikipedia Glossary of probability and statistics#7K9V |
| Trimmed estimator | GHKF80FT9Y | definition | open | Wikipedia List of statistics articles#9VRH |
| Trimmed estimator | XETGRV2989 | definition | open | Wikipedia Trimmed estimator, Wikidata Q17144114 |
| Trimmed mean test | NCBPFPCQ3M | 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 2610.10840#H0D5 |
| Trimmed mean test error rate | WNY51WVTTC | 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 2610.10840#MHX3 |
| Trimming | RRQQFE5P5V | 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 2610.03353#BKJ6 |
| trimorphic number | KS74NRCZGK | unknown | open | Wikidata Q4357614, MathWorld TrimorphicNumber |
| Trimorphic number | NCF0SFK8W1 | unknown | open | Wikipedia Automorphic number#8UE3 |
| Trinafour | GX1JV7YH7M | unknown | open | Wikipedia List of places with numeric names#TCKY |
| Trinity Mathematical Society | V9SN76BMQB | definition | open | Wikipedia Trinity Mathematical Society, Wikidata Q15990165 |
| Trinity Mathematical Society | VRV49C68VD | definition | open | Wikipedia List of mathematical societies#1VLS |
| Trinity Mirror | NC80APZS3H | unknown | open | Wikipedia List of people arrested in the News International phone-hacking scandal#JD74 |
| trinodal | 5RQDQ6FS4E | definition | open | Wikipedia Glossary of classical algebraic geometry#W6CF |
| trinoid | STXCXVCWCA | unknown | open | Wikidata Q123472210, MathWorld Trinoid |
| trinomial | 9CKMDZJYQW | definition | open | Wikipedia Glossary of invariant theory#V4Q3 |
| trinomial | DJBV640MB9 | definition | open | Wikidata Q1670509, MathWorld Trinomial, Wikipedia Trinomial |
| trinomial coefficient | XJF6DMKDTR | unknown | open | Wikidata Q123472215, MathWorld TrinomialCoefficient |
| Trinomial distribution | VT5PZYRX4W | unknown | open | Wikipedia Pascal's pyramid#I9KY |
| Trinomial expansion | 7XTKQ57KGQ | definition | open | Wikipedia Trinomial expansion, Wikidata Q3077653 |
| Trinomial expansion | JMPM6QSM4M | definition | open | Wikipedia List of factorial and binomial topics#301A |
| Trinomial tree | CQB847J2JR | definition | open | Wikipedia Trinomial tree, Wikidata Q7843049 |
| trinomial triangle | DD2YAWGB6F | definition | open | Wikidata Q1594413, MathWorld TrinomialTriangle, OEIS A027907, Wikipedia Trinomial triangle |
| tripartite | T349MYG8WE | definition | open | Wikipedia Glossary of classical algebraic geometry#ABHK |
| Triperfect | 113MG4N7M3 | unknown | open | Wikipedia Multiply perfect number#A4UB |
| triple | G746J66JJW | unknown | open | Wikidata Q20088882, MathWorld Triple |
| triple angle identity | 4PQCGZRW6E | statement | open | Wikidata Q140071457, ProofWiki Triple_Angle_Formulas |
| Triple bar | 5PMT9NGHH1 | definition | open | Wikipedia Triple bar, Wikidata Q7843500 |
| triple bar | CNF3HVT7WZ | definition | open | Wikipedia Glossary of mathematical symbols#A8PK |
| Triple cities | QQNB31MB25 | unknown | open | Wikipedia List of places with numeric names#0JKO |
| Triple correlation | RTRY5RRC9N | definition | open | Wikipedia Triple correlation, Wikidata Q7843504 |
| Triple DES | A6FG7SN2AG | definition | open | Wikipedia Triple DES, Wikidata Q134983 |
| Triple helix | AE534DR0FD | definition | open | Wikipedia Triple helix, Wikidata Q7843514 |
| triple integral | 20SYEJ21T3 | unknown | node (a node has the same name as the row) | Wikidata Q110660584, MathWorld TripleIntegral |
| triple integral | DGDF9NM0W4 | definition | open | Wikipedia Glossary of calculus#X55K |
| Triple integral | M2BG62R725 | unknown | open | Wikipedia Multiple integral#F4GD |
| Triple Islands | SX2PP0G8V9 | unknown | open | Wikipedia List of places with numeric names#ESN2 |
| Triple junction as curvature varifold with boundary | ARPQJ0RFJ6 | 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 2610.04833#Y14O |
| Triple modular redundancy | QYK2Y5Q3Q7 | unknown | open | Wikipedia List of algebraic coding theory topics#A34D |
| triple point | 6VXQ690K9D | unknown | open | Wikidata Q123472283, MathWorld TriplePoint |
| Triple point | WMP7SATE6K | definition | open | Wikipedia Triple point, Wikidata Q106410 |
| Triple point cell | 342CMNKB1M | unknown | open | Wikipedia Triple point#01UH |
| triple product | 9VNH41ZN8A | unknown | open | mathlib_undergrad Bilinear and Quadratic Forms Over a Vector Space > Low dimensions > triple product, Mathlib triple_product_eq_det |
| triple product | PDMPMN509D | definition | open | Wikidata Q36248, MathWorld ScalarTripleProduct, Wikipedia Triple product |
| Triple product of primes | FA7D77P7P7 | statement | open | napkin tex/H113/sylow.tex#proposition-1 |
| Triple product rule | 312NM35AW7 | definition | open | Wikipedia Triple product rule, Wikidata Q7843530 |
| Triple system | Q9NBVRVJZV | definition | open | Wikipedia Triple system, Wikidata Q11358307 |
| Triple-alignment extinction | MHH8JPRMJP | 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 2610.10557#JVE5 |
| Triple-angle formula | TRYNKA8D3D | unknown | open | Wikipedia List of trigonometric identities#CI0V |
| Triplet loss | C8YBEJRRC9 | definition | open | Wikipedia Triplet loss, Wikidata Q60795200 |
| Tripling | YVRJWGBP64 | 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 2610.10095#00D4 |
| Tripling-oriented Doche–Icart–Kohel curve | 1M9FNYP8M2 | definition | open | Wikipedia Tripling-oriented Doche–Icart–Kohel curve, Wikidata Q7843607 |
| Triply periodic minimal surface | 1A9QC6Q5ZT | definition | open | Wikipedia List of mathematical shapes#IC6D, Wikipedia List of surfaces#A70X |
| Triply periodic minimal surface | KGN73GXP0G | definition | open | Wikipedia Triply periodic minimal surface, Wikidata Q7843643 |
| tripod graph | 1910182A0V | unknown | open | Wikidata Q137542570, MathWorld Tripod |
| Tripod packing | 97HGBQRG22 | conjecture | open | Wikipedia Tripod packing, Wikidata Q65074283 |
| Tripod packing | RTNZD03JKJ | conjecture | open | Wikipedia List of unsolved problems in mathematics#IQGC |
| tripolar coordinates | 200JAKPPKS | unknown | open | Wikidata Q2845837, MathWorld TripolarCoordinates |
| Tripoli, Lebanon | F2EDTRZEQE | unknown | open | Wikipedia List of places with numeric names#J6QX |
| Tripoli, Libya | 4KYTRG10XG | unknown | open | Wikipedia List of places with numeric names#8V3U |
| Tripolitania | 8ZKWGW5S70 | unknown | open | Wikipedia List of places with numeric names#B259 |
| Triquetra | P7VMD63JZA | unknown | open | Wikipedia List of triangle topics#R3DQ, Wikipedia List of two-dimensional geometric shapes#ADPI |
| trirectangular tetrahedron | YWGDJKDZTK | definition | open | Wikidata Q7843925, MathWorld TrirectangularTetrahedron, Wikipedia Trirectangular tetrahedron |
| Trirectified 6-cubic honeycomb | YC1NCWA02M | unknown | open | Wikipedia 6-cubic honeycomb#OLK8 |
| Trirectified 7-orthoplex | VXWH5ZJ7HA | unknown | open | Wikipedia Rectified 7-orthoplexes#NLOR |
| Trirectified 9-cube | NEK03PNHYB | unknown | open | Wikipedia Rectified 9-cubes#OEOC |
| Trischiliagon | AB8RX1GG44 | definition | open | Wikipedia List of two-dimensional geometric shapes#KI31 |
| trisecant | TR7KBDY1ZJ | definition | open | Wikipedia Glossary of classical algebraic geometry#G6HI |
| Trisected an angle | 6QH6HKF2W5 | unknown | open | Wikipedia Straightedge and compass construction#Q5FF |
| trisected perimeter point | 4MD5ETT25E | definition | open | Wikidata Q16999896, MathWorld TrisectedPerimeterPoint, Wikipedia Trisected perimeter point |
| Trisected perimeter point | SSSM3NJGJR | definition | open | Wikipedia List of triangle topics#N68K |
| Trisecting the 4-torus | EJBAEVH0JK | 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 1911.06467#6WTA |
| Trisection of closed 4-manifold | VECRP919J5 | 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 1911.06467#44UQ |
| Trisectrix | C3P2NY0N3J | definition | open | Wikidata Q2454131, MathWorld Trisectrix, Wikipedia Trisectrix |
| trisectrix of Ceva | 6B8F5ZJ6KF | concept | open | Wikidata Q65185260, MathWorld CycloidofCeva |
| trisectrix of Maclaurin | AJ2381CPN9 | concept | open | Wikidata Q3294140, MathWorld MaclaurinTrisectrix, Wikipedia Trisectrix of Maclaurin |
| Trisectrix of Maclaurin | MFKYRFFGZP | definition | open | Wikipedia List of mathematical shapes#FX2M, Wikipedia List of curves#KH7R |
| Trishal | TTRG809145 | unknown | open | Wikipedia List of places with numeric names#S0LS |
| Triskaidecagon | A79GCW4CW2 | definition | open | Wikipedia List of mathematical shapes#OV9C, Wikipedia List of polygons, polyhedra and polytopes#S2QH |
| triskaidekaphobia | NC9NQC7TC7 | unknown | open | Wikidata Q13, MathWorld Triskaidekaphobia |
| Trispectrum | 1R46DYV92W | definition | open | Wikipedia List of statistics articles#6BG7 |
| Trispectrum | YVDKWVM33N | unknown | open | Wikipedia Bispectrum#UXR8 |
| Tristan Hübsch | JYYJZS3M3P | unknown | out_of_scope (a person, not an item of mathematics) | Wikidata Q74409062, nLab Tristan Hübsch |
| Tristan Needham | QE0N8XQTND | topic | open | Wikipedia Tristan Needham, Wikidata Q11000497 |
| Tristan Rivière | NVWX3RA7XG | topic | open | Wikipedia List of International Congresses of Mathematicians Plenary and Invited Speakers#TMTR |
| Tristan Rivière | QED54DT5HJ | topic | open | Wikipedia Tristan Rivière, Wikidata Q15851542 |
| Tristram Shandy paradox | S6J998H1PE | unknown | open | Wikipedia Paradoxes of set theory#Q01C |
| tritangent | WCMFW49FE9 | definition | open | Wikipedia Glossary of classical algebraic geometry#S6XL |
| Trithemius cipher | 41AQH8RJD4 | unknown | open | Wikipedia Tabula recta#QQ22 |
| Tritruncated 5-cubic honeycomb | H9KMXEPVCG | unknown | open | Wikipedia 5-cubic honeycomb#JC0O |
| Triune continuum paradigm | EJ4N6J9CA5 | definition | open | Wikipedia Triune continuum paradigm, Wikidata Q7844605 |
| Trivariate Clayton copula | HGHRNZSKHZ | 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 2610.14318#UHBV |
| trivial | AFY37B0QWM | definition | open | Wikipedia Glossary of graph theory#UPEC |
| trivial | ESWK764QYF | definition | open | Wikipedia Glossary of commutative algebra#F40X |
| trivial | HMR6NEM329 | definition | open | Wikipedia Glossary of ring theory#A8FG |
| trivial | KTA7PFNDEM | definition | open | Wikipedia Glossary of mathematical jargon#WOJZ |
| trivial | W5NHTCJFVT | definition | open | Wikipedia Glossary of representation theory#ES3M |
| Trivial algebra extension | 8H3VYBV6EX | unknown | open | Wikipedia Algebra extension#B1G3 |
| trivial bounds for $\widehat Q_{\bf m}f$ | 3ZC4TN4RA1 | 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 2210.06147#O6Q4 |