| Tan |
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proper noun
- An English surname derived from the transliteration of various Asian surnames, particularly originating from China and Vietnam.
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| tangent |
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noun
- (geometry) A straight line touching a curve at a single point without crossing it there.
- (trigonometry) In a right triangle, the ratio of the length of the side opposite the angle to the length of the side adjacent to the angle. Symbol: tan
<!--This definition equivalent to the one above; it does not define a new sense of the word
- (mathematics) The ratio of the sine to the cosine, in either the real or complex numbers.-->
- A topic nearly unrelated to the main topic, but having a point in common with it.
- I believe we went off onto a when we started talking about unicycles.
- A small metal blade by which a clavichord produces sound.
adjective
- (geometry) Touching a curve at a single point but not crossing it at that point.
- Of a topic, only loosely related to a main topic.
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| tensor |
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noun
- A muscle that stretches a part, or renders it tense.
- (algebra) the image of a tuple under a tensor product map
- (topology) a function of several variables which is a product of a number of functions of one variable, one for each variable, each of which is linear in that variable
- (physics) a matrix of matrices
verb
- To compute the tensor product of something with something else
adjective
- Of or relating to tensors
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| tenth |
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noun
- The person or thing in the tenth position.
- One of ten equal parts of a whole.
adjective
- The ordinal form of the number ten.
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| tesseract |
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noun (tesseract)
- (mathematics) The four-dimensional analogue/analog of a cube; a four-dimensional content (which see) bounded by eight cubes (in the same way as a cube is a volume bounded by six squares and a square is an area by four line segments).
- (figurative) A wrinkle in time that makes time travel possible. (Used by w:Madeleine L'Engle, Madeleine L'Engle in her science-fiction novel, A Wrinkle in Time.)
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| tetragon |
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noun
- (context, geometry, rare) A quadrilateral.
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| tetragonal |
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adjective
- Having four sides (as a tetragon); quadrilateral.
- (crystallography) Having two equal axes and one unequal, and all angles 90°.
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| tetrahedral |
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adjective
- in the shape of a tetrahedron
- having four faces, four apices and six edges
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| tetrahedron |
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noun (pl2=tetrahedra)
- (geometry) a polyhedron with four faces; the regular tetrahedron, the faces of which are equal equilateral triangles, is one of the Platonic solids.
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| theorem |
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noun
- (mathematics) A mathematical statement of some importance that has been proven to be true. Minor theorems are often called propositions. Theorems which are not very interesting in themselves but are an essential part of a bigger theorem's proof are called lemmas
- (mathematics, colloquially, incorrectly) A mathematical statement that is expected to be true; as, w:Fermat's Last Theorem, Fermat's Last Theorem (as which it was known long before it was proved in the 1990s.)
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| theory |
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noun (theor, ies, -)
- (countable) An unproven conjecture.
- I have a about who broke into the school last night, but I have no proof to back it up.
- (uncountable) An expectation of what should happen, barring unforeseen circumstances.
- So we"ll be there in three hours? " That"s the .
- (countable) (science) A coherent statement or set of statements that attempts to explain observed phenomenon, phenomena.
- There is now a well-developed of electrical charge.
- (countable) (science) A logical structure that enables one to deduce the possible results of every experiment that falls within its purview.
- The of relativity was proposed by Einstein.
- (uncountable) (mathematics) A field of study attempting to exhaustively describe a particular class of constructs.
- Knot classifies the mappings of a circle into 3-space.
- (countable) (logic) A set of axioms together with all statements derivable from them.
- A is consistent if it has a model.
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| theory of games |
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noun
- (context, mathematics, economics) An older term for game theory.
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| thousandth |
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noun
- (plural thousandth ones) The person or thing in the thousandth position.
- One of a thousand equal parts of a whole.
adjective
- The ordinal form of the number thousand, one thousand.
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| tilde |
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noun
- (orthography): A diacritical mark placed above a letter to modify its pronunciation, such as by palatalization in Spanish words or nasalization in Portuguese words.
- A key found on some types of keyboards.
- A character resembling a curved hyphen (~). ASCII character 126. May represent approximation.
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| Times |
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proper noun - (newspapers) A common name (often in combination) for a newspaper or periodical, especially w:The Times, The Times (published in the United Kingdom), but also w:The New York Times, The New York Times, w:The Times of India, The Times of India, w:Radio Times, Radio Times, etc.
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| times sign |
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noun - (context, arithmetic, informal) A multiplication sign.
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| TO |
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abbreviation
- (informal) Toronto, a Canadian city. (Also T.O.)
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| transcendental function |
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noun - (mathematics) a function which does not satisfy a polynomial equation whose coefficients are themselves polynomials
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| transcendental number |
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noun - (mathematics) any irrational number that is not an algebraic number
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| transpose |
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noun
- (linearalg) The matrix formed by interchange, interchanging the rows and columns of another.
verb (transpos, ing)
- (transitive) To reverse or change the order of (two or more things); to swap or interchange.
- (transitive) (music) To rewrite or perform (a piece) in another key
- (transitive) (algebra) To move (a term) from one side of an algebraic equation to the other, reverse, reversing the sign of the term.
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| triangle inequality |
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noun the triangle inequality (uncountable)
- (analysis) The inequality that states that the magnitude of the sum of two vectors is less than or equal to the sum of the magnitudes of the vectors, or any equivalent inequality in other spaces.
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| truncated |
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verb
- (past of, truncate)
<!--this belongs on the page for "truncate"
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| Turing machine |
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noun
- (comptheory) An abstract computing machine introduced in 1936 by Alan Turing to give a mathematically precise definition of computability.
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