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Glossary of Math Terms
beginning with letter T
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Tan Tweet Definition of Tan Like Definition of Tan on Facebook
proper noun 
  1. An English surname derived from the transliteration of various Asian surnames, particularly originating from China and Vietnam.
tangent Tweet Definition of tangent Like Definition of tangent on Facebook
  1. (geometry) A straight line touching a curve at a single point without crossing it there.
  2. (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
  1. (mathematics) The ratio of the sine to the cosine, in either the real or complex numbers.-->
  2. 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.
  1. A small metal blade by which a clavichord produces sound.
  1. (geometry) Touching a curve at a single point but not crossing it at that point.
  2. Of a topic, only loosely related to a main topic.
tensor Tweet Definition of tensor Like Definition of tensor on Facebook
  1. A muscle that stretches a part, or renders it tense.
  2. (algebra) the image of a tuple under a tensor product map
  3. (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
  4. (physics) a matrix of matrices
  1. To compute the tensor product of something with something else
  1. Of or relating to tensors
tenth Tweet Definition of tenth Like Definition of tenth on Facebook
  1. The person or thing in the tenth position.
  2. One of ten equal parts of a whole.
  1. The ordinal form of the number ten.
tesseract Tweet Definition of tesseract Like Definition of tesseract on Facebook
noun (tesseract)
  1. (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).
  2. (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.)
tetragon Tweet Definition of tetragon Like Definition of tetragon on Facebook
  1. (context, geometry, rare) A quadrilateral.
tetragonal Tweet Definition of tetragonal Like Definition of tetragonal on Facebook
  1. Having four sides (as a tetragon); quadrilateral.
  2. (crystallography) Having two equal axes and one unequal, and all angles 90°.
tetrahedral Tweet Definition of tetrahedral Like Definition of tetrahedral on Facebook
  1. in the shape of a tetrahedron
  2. having four faces, four apices and six edges
tetrahedron Tweet Definition of tetrahedron Like Definition of tetrahedron on Facebook
noun (pl2=tetrahedra)
  1. (geometry) a polyhedron with four faces; the regular tetrahedron, the faces of which are equal equilateral triangles, is one of the Platonic solids.
theorem Tweet Definition of theorem Like Definition of theorem on Facebook
  1. (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
  2. (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.)
theory Tweet Definition of theory Like Definition of theory on Facebook
noun (theor, ies, -)
  1. (countable) An unproven conjecture.
I have a about who broke into the school last night, but I have no proof to back it up.
  1. (uncountable) An expectation of what should happen, barring unforeseen circumstances.
So we"ll be there in three hours? " That"s the .
  1. (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.
  1. (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.
  1. (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.
  1. (countable) (logic) A set of axioms together with all statements derivable from them.
A is consistent if it has a model.
theory of games Tweet Definition of theory of games Like Definition of theory of games on Facebook
  1. (context, mathematics, economics) An older term for game theory.
thousandth Tweet Definition of thousandth Like Definition of thousandth on Facebook
  1. (plural thousandth ones) The person or thing in the thousandth position.
  2. One of a thousand equal parts of a whole.
  1. The ordinal form of the number thousand, one thousand.
tilde Tweet Definition of tilde Like Definition of tilde on Facebook
  1. (orthography): A diacritical mark placed above a letter to modify its pronunciation, such as by palatalization in Spanish words or nasalization in Portuguese words.
  2. A key found on some types of keyboards.
  3. A character resembling a curved hyphen (~). ASCII character 126. May represent approximation.
Times Tweet Definition of Times Like Definition of Times on Facebook
proper noun 
  1. (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.
times sign Tweet Definition of times sign Like Definition of times sign on Facebook
  1. (context, arithmetic, informal) A multiplication sign.
TO Tweet Definition of TO Like Definition of TO on Facebook
  1. (informal) Toronto, a Canadian city. (Also T.O.)
transcendental function Tweet Definition of transcendental function Like Definition of transcendental function on Facebook
  1. (mathematics) a function which does not satisfy a polynomial equation whose coefficients are themselves polynomials
transcendental number Tweet Definition of transcendental number Like Definition of transcendental number on Facebook
  1. (mathematics) any irrational number that is not an algebraic number
transpose Tweet Definition of transpose Like Definition of transpose on Facebook
  1. (linearalg) The matrix formed by interchange, interchanging the rows and columns of another.
verb (transpos, ing)
  1. (transitive) To reverse or change the order of (two or more things); to swap or interchange.
  2. (transitive) (music) To rewrite or perform (a piece) in another key
  3. (transitive) (algebra) To move (a term) from one side of an algebraic equation to the other, reverse, reversing the sign of the term.
triangle inequality Tweet Definition of triangle inequality Like Definition of triangle inequality on Facebook
noun the triangle inequality (uncountable)
  1. (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.
truncated Tweet Definition of truncated Like Definition of truncated on Facebook
  1. (past of, truncate)
<!--this belongs on the page for "truncate"      
Turing machine Tweet Definition of Turing machine Like Definition of Turing machine on Facebook
  1. (comptheory) An abstract computing machine introduced in 1936 by Alan Turing to give a mathematically precise definition of computability.

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