| Tridecagon | SMXCY41XHF | definition | open | Wikipedia List of mathematical shapes#NXKN |
| tridecagonal number | DMMZA4AJYF | object | open | Wikidata Q18449456, OEIS A051865 |
| Tridecahedron | F58ZQX4Y3P | object | open | Wikipedia Tridecahedron, Wikidata Q16948184 |
| Trident curve | GKP0YGCSZ2 | definition | open | Wikipedia List of mathematical shapes#Z9O9, Wikipedia List of curves#TDYQ |
| trident curve | XG98GB7TPT | definition | open | Wikidata Q3539099, MathWorld TridentofNewton, Wikipedia Trident curve |
| tridiagonal matrix | TSE3ZEZGV0 | definition | open | Wikidata Q1755277, MathWorld TridiagonalMatrix, ProofWiki Definition:Tridiagonal_Matrix, Wikipedia Tridiagonal matrix |
| Tridiagonal matrix algorithm | 5B26KB4DXZ | definition | open | Wikipedia Tridiagonal matrix algorithm, Wikidata Q1819156 |
| tridiminished icosahedron | H60R2RHXY6 | definition | open | Wikidata Q2997642, MathWorld TridiminishedIcosahedron, Wikipedia Tridiminished icosahedron |
| Tridiminished icosahedron | Q4X93HMJ3H | definition | open | Wikipedia List of mathematical shapes#BMXK, Wikipedia List of polygons, polyhedra and polytopes#SH5Z |
| tridiminished rhombicosidodecahedron | V2JB13MVP1 | definition | open | Wikidata Q288249, MathWorld TridiminishedRhombicosidodecahedron, Wikipedia Tridiminished rhombicosidodecahedron |
| Tridiminished rhombicosidodecahedron | V581WP5WJS | definition | open | Wikipedia List of mathematical shapes#MAYS, Wikipedia List of polygons, polyhedra and polytopes#ARES |
| tridyakis icosahedron | Y2SG8GWH84 | object | open | Wikidata Q18048478, MathWorld TridyakisIcosahedron, Wikipedia Tridyakis icosahedron |
| Triebel–Lizorkin space | JBNCVZWAX5 | definition | open | Wikipedia Triebel–Lizorkin space, Wikidata Q7841428 |
| Triflake | AP4WZVARVN | definition | open | Wikipedia List of mathematical shapes#HWRE |
| Trifocal tensor | 9E8GWDN5BM | definition | open | Wikipedia Trifocal tensor, Wikidata Q2453115 |
| trifolium | TPJFKVEMWP | unknown | open | Wikidata Q9361580, MathWorld Trifolium |
| Trifolium curve | 9GY74H36GM | definition | open | Wikipedia List of mathematical shapes#GJY3 |
| Trifolium curve | KXTT3JJ4M3 | definition | open | Wikipedia Trifolium curve, Wikidata Q128304449 |
| Trig Derivatives | Q7W6MHZS1Q | unknown | open | Wikipedia Differentiation rules#G36U |
| Trigamma function | 4EH72TCHGR | definition | open | Wikidata Q1244426, MathWorld TrigammaFunction, Wikipedia Trigamma function |
| Trigenus | DV2PHJ63K6 | definition | open | Wikipedia Trigenus, Wikidata Q7841685 |
| Trigintaduonion | 3SYN7YM5HJ | definition | open | Wikipedia Trigintaduonion, Wikidata Q111667622 |
| Trigintaduonion | HX2RKAVEP1 | definition | open | Wikipedia List of numbers#BKBP |
| Trigintaduonion | SQAV99JF96 | definition | open | Wikipedia List of mathematical abbreviations#B4Z2 |
| Triglav | CQHC7ZEDTQ | unknown | open | Wikipedia List of places with numeric names#JJ5O |
| Trigon Bluff | QMBEA1GT7V | unknown | open | Wikipedia List of places with numeric names#HV4O |
| trigonal | KA18P3E089 | definition | open | Wikipedia Glossary of classical algebraic geometry#Z7QD |
| Trigonal trapezohedral honeycomb | DE2RBBER31 | object | open | Wikipedia Trigonal trapezohedral honeycomb, Wikidata Q17078571 |
| trigonal trapezohedron | N9GJ3VDAWV | object | open | Wikidata Q3100536, MathWorld TrigonalTrapezohedron, Wikipedia Trigonal trapezohedron |
| Trigonometric approximation | GH63A719C1 | 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 2606.02312#4V9Y |
| Trigonometric formulas | Q7JWDCQ1DS | statement | open | Wikipedia Quadrilateral#KDM7 |
| Trigonometric formulas | V2BXJ5EDTC | statement | open | Wikipedia Tangential quadrilateral#0N5T |
| Trigonometric function | 3SJXW2RY2H | definition | open | Wikipedia List of triangle inequalities#9BJU |
| Trigonometric function | K4V9K7Z3F7 | definition | open | Wikipedia List of harmonic analysis topics#DUZ2 |
| trigonometric function | ZS2AN5QQPQ | definition | open | Wikidata Q93344, MathWorld TrigonometricFunctions, nLab trigonometric function, Wikipedia Trigonometric functions |
| Trigonometric functions | CP6GR6AR59 | definition | open | Wikipedia List of triangle topics#XA72 |
| trigonometric functions | GVFX4WT634 | unknown | open | mathlib_overview Analysis > Special functions > trigonometric functions, Mathlib Real.sin, mathlib_undergrad Single Variable Real Analysis > Elementary functions (trigonometric, rational, $\exp$, $\log$, etc) > trigonometric functions |
| trigonometric functions | S4QFG75HQS | definition | open | Wikipedia Glossary of calculus#O36S |
| Trigonometric functions | SN43FB26XZ | definition | open | Wikipedia List of types of functions#6NQM |
| Trigonometric functions of matrices | XWWMQQSXMX | definition | open | Wikipedia Trigonometric functions of matrices, Wikidata Q25102127 |
| trigonometric identities | 8QVJ44EZ41 | definition | open | Wikipedia Glossary of calculus#U22Y |
| Trigonometric identities | PNAF76BM9B | topic | open | Wikipedia List of mathematics reference tables#RXAN |
| trigonometric identity | N6PQ7W308B | unknown | open | Wikidata Q58437145, nLab trigonometric identity |
| Trigonometric integral | 8XWGWVSRWJ | definition | open | Wikipedia Trigonometric integral, Wikidata Q1094282 |
| Trigonometric integral | XCPP4MZ1T5 | definition | open | Wikipedia List of mathematical functions#HJPC |
| trigonometric integral | YBRFVCSRWH | definition | open | Wikipedia Glossary of calculus#1F1J |
| Trigonometric interpolation | H3DDQQ4H2G | definition | open | Wikipedia List of algorithms#WRTF |
| Trigonometric interpolation | KYZERVH4MJ | definition | open | Wikipedia Trigonometric interpolation, Wikidata Q464356 |
| Trigonometric moment problem | 8T90XW94S4 | problem | open | Wikipedia Trigonometric moment problem, Wikidata Q7841830 |
| Trigonometric number | D96PAN9HWP | definition | open | Wikipedia List of types of numbers#MY8X |
| Trigonometric polynomial | 4M50E9SMAT | definition | open | Wikipedia Trigonometric polynomial, Wikidata Q1969650 |
| Trigonometric polynomial | RA23CR208T | definition | open | Wikipedia List of harmonic analysis topics#M6AI |
| trigonometric power formulas | GEE5C89R30 | statement | open | Wikidata Q140299171, MathWorld TrigonometricPower-ReductionFormulas, MathWorld TrigonometricPowerFormulas, ProofWiki Power_Reduction_Formulas |
| Trigonometric Ratios | Q54GKAGXDB | unknown | open | Wikipedia Trigonometry#029E |
| Trigonometric Series | EWFFQ74V7M | definition | open | Wikipedia Trigonometric Series, Wikidata Q104841732 |
| Trigonometric series | Y1Z0MEX552 | definition | open | Wikipedia Trigonometric series, Wikidata Q1149336 |
| trigonometric substitution | 4WPDG5MHCA | definition | open | Wikipedia Glossary of calculus#WF4X |
| Trigonometric substitution | 6RF15DN4DX | definition | open | Wikipedia Trigonometric substitution, Wikidata Q1191963 |
| Trigonometric substitution | YJ1GNETN2R | definition | open | Wikipedia List of triangle topics#HQ90, Wikipedia List of calculus topics#9L1R |
| Trigonometric table | QWS92TTMP5 | definition | open | Wikipedia Trigonometric table, Wikidata Q787322 |
| Trigonometric tables | J1EXKE4YZ7 | definition | open | Wikipedia List of triangle topics#YN7I |
| Trigonometry | AS1DR2PXEB | topic | open | Wikipedia List of triangle topics#L9GM |
| trigonometry | EWM3977NZ1 | definition | open | Wikipedia Glossary of calculus#F8JC |
| trigonometry | F8JQG5YPRM | concept | open | active_calculus index/2.4.1/trigonometry |
| Trigonometry | N7SY2V2WY1 | definition | open | Wikipedia Glossary of areas of mathematics#0K0T |
| trigonometry | RYQT0H4A13 | topic | open | Wikidata Q8084, MathWorld Trigonometry, ProofWiki Definition:Trigonometry, Wikipedia Trigonometry |
| Trigonometry in ancient Egypt | K73B2QDSJE | unknown | open | Wikipedia History of trigonometry#RNFM |
| Trigonometry of a tetrahedron | J52T6QS2HX | definition | open | Wikipedia Trigonometry of a tetrahedron, Wikidata Q25109970 |
| trigonometry, fundamental trigonometric identity | Z9R3YYB4DN | concept | open | active_calculus index/2.4.1/trigonometry-fundamental-trigonometric-identity |
| Trigrad Gap | NETECJKFTF | unknown | open | Wikipedia List of places with numeric names#ZYF2 |
| Trigram search | ANC7QPPQ39 | unknown | open | Wikipedia List of algorithms#WIGR |
| trigyrate rhombicosidodecahedron | G613HKCHZP | definition | open | Wikidata Q2030406, MathWorld TrigyrateRhombicosidodecahedron, Wikipedia Trigyrate rhombicosidodecahedron |
| Trigyrate rhombicosidodecahedron | WGW2KH9M9C | definition | open | Wikipedia List of mathematical shapes#IP7T, Wikipedia List of polygons, polyhedra and polytopes#IPPW |
| Trihectogon | W031H1FRXB | unknown | open | Wikipedia List of two-dimensional geometric shapes#W2R6 |
| trihedral | PX6CA2Q5N9 | definition | open | Wikipedia Glossary of classical algebraic geometry#IMTM |
| trihedron | 7JPNHSTBHZ | unknown | open | Wikidata Q28649187, MathWorld Trihedron |
| Triheptagonal tiling | AVTWNKH6YW | object | open | Wikipedia Triheptagonal tiling, Wikidata Q3505059 |
| Trihexaflexagon | 5YPE2Z9AV7 | unknown | open | Wikipedia Flexagon#DIMI |
| Trihexagonal tiling | 357DN537JR | object | open | Wikipedia Trihexagonal tiling, Wikidata Q3131849 |
| Trihexagonal tiling | FR1K6J6C6K | object | open | Wikipedia List of Euclidean uniform tilings#HUXC |
| Trihexagonal tiling | P8CJ7ZN5Z5 | object | open | Wikipedia List of polygons, polyhedra and polytopes#L3TE |
| Trikonic | THY0A24AMC | definition | open | Wikipedia Trikonic, Wikidata Q7841966 |
| Trilateration | 6C7NV4TGDB | definition | open | Wikipedia Trilateration, Wikidata Q1146298 |
| Trilemma | R88MFNCDSR | definition | open | Wikipedia Trilemma, Wikidata Q1073549 |
| Trilinear coordinates | 46HSWJHHHM | definition | open | Wikipedia List of triangle topics#Y1X5 |
| trilinear coordinates | 57S6QMPR9W | definition | open | Wikidata Q1888119, MathWorld TrilinearCoordinates, Wikipedia Trilinear coordinates |
| trilinear coordinates | DVXW9ASZF8 | definition | open | Wikipedia Glossary of classical algebraic geometry#S3ID |
| Trilinear filtering | AY0GZ82B32 | unknown | open | Wikipedia List of computer graphics and descriptive geometry topics#NXRE |
| Trilinear interpolation | N7K9NV4FW8 | definition | open | Wikipedia Trilinear interpolation, Wikidata Q861176 |
| Trilinear Kakeya in $\RR^4$ | 352JKQSS77 | 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 2610.12480#9FWB |
| Trilinear polarity | PS6DTDB0G8 | unknown | open | Wikipedia List of triangle topics#GRWV |
| Trilinos | JCQCRXWDZ1 | unknown | open | Wikipedia List of open-source software for mathematics#UCYQ |
| Trilinos | K45E7GC9Y1 | unknown | open | Wikipedia List of numerical-analysis software#1HWC |
| trillion | QCKSA0QHQ2 | unknown | open | Wikidata Q41650357, MathWorld Trillion |
| trillium theorem | HADXS061QD | statement | open | Wikidata Q18430596, MathWorld Incenter-ExcenterCircle, Wikipedia Incenter–excenter lemma |
| Trilobite and cross tiles | GWM6MW1DQH | unknown | open | Wikipedia List of aperiodic sets of tiles#WCFY |
| trilogarithm | M9TXW1WNVX | unknown | open | Wikidata Q91314064, MathWorld Trilogarithm |
| Trim and fill | 9ZAW7TECJA | unknown | open | Wikipedia Publication bias#ZMLI |
| trimagic square | 7AYSVF8WX5 | unknown | open | Wikidata Q2940415, MathWorld TrimagicSquare |
| Trimagic square | VG7S1HP4VQ | unknown | open | Wikipedia Multimagic square#VNSK |