"splitting field" meaning in All languages combined

{
  "forms": [
    {
      "form": "splitting fields",
      "tags": [
        "plural"
      ]
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      "args": {},
      "expansion": "splitting field (plural splitting fields)",
      "name": "en-noun"
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  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "related": [
    {
      "_dis1": "30 29 28 14",
      "word": "split K-algebra"
    },
    {
      "_dis1": "30 29 28 14",
      "word": "split Lie algebra"
    }
  ],
  "senses": [
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          "langcode": "en",
          "name": "Algebra",
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          "_dis": "39 26 24 10",
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          "source": "w+disamb"
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        {
          "ref": "1974, Thomas W. Hungerford, Algebra, Springer, page 258",
          "text": "Theorem 3.2. If K is a field and f#x5C;inK#x5B;x#x5D; has degree n#x5C;ge 1, then there exists a splitting field F of f with #x5B;F#x3A;K#x5D;#x5C;len#x21;",
          "type": "quotation"
        },
        {
          "ref": "2003, Derek J. S. Robinson, An Introduction to Abstract Algebra, Walter de Gruyter, page 130",
          "text": "In the case of the polynomial t²#x2B;1#x5C;in#x5C;R#x5B;t#x5D;, the situation is quite clear; its splitting field is #x5C;C since t²#x2B;1#x3D;(t#x2B;i)(t-i) where i#x3D;#x5C;sqrt#x7B;-1#x7D;.",
          "type": "quotation"
        },
        {
          "ref": "2009, Paolo Aluffi, Algebra: Chapter 0, American Mathematical Society, page 430",
          "text": "Example 4.3. By definition, #x5C;Q(i) is the splitting field of x²#x2B;1 over #x5C;Q, and #x5C;C is the splitting field for the same polynomial, over #x5C;R.\nExample 4.4. The splitting field F of x⁸-1 over #x5C;Q is generated by #x5C;zeta#x3A;#x3D;2#x7B;2#x5C;pii#x2F;8#x7D;; indeed, the roots of x⁸-1 are all the 8-th roots of 1, and all of them are powers of #x5C;zeta:[…]In fact, #x5C;zeta is a root of the polynomial x⁴#x2B;1, which is irreducible over #x5C;Q; therefore F#x3D;#x5C;Q(#x5C;zeta) is 'already' the splitting field of x⁴#x2B;1.",
          "type": "quotation"
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      ],
      "glosses": [
        "(of a polynomial) Given a polynomial p over a field K, the smallest extension field L of K such that p, as a polynomial over L, decomposes into linear factors (polynomials of degree 1); (of a set of polynomials) given a set P of polynomials over K, the smallest extension field of K over which every polynomial in P decomposes into linear factors."
      ],
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      ],
      "qualifier": "Galois theory",
      "raw_glosses": [
        "(algebra, Galois theory) (of a polynomial) Given a polynomial p over a field K, the smallest extension field L of K such that p, as a polynomial over L, decomposes into linear factors (polynomials of degree 1); (of a set of polynomials) given a set P of polynomials over K, the smallest extension field of K over which every polynomial in P decomposes into linear factors."
      ],
      "synonyms": [
        {
          "word": "root field"
        }
      ],
      "topics": [
        "algebra",
        "mathematics",
        "sciences"
      ],
      "translations": [
        {
          "_dis1": "44 23 22 10",
          "code": "eu",
          "lang": "Basque",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "word": "deskonposizio gorputz"
        },
        {
          "_dis1": "44 23 22 10",
          "code": "eu",
          "lang": "Basque",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "word": "banatze gorputz"
        },
        {
          "_dis1": "44 23 22 10",
          "code": "fr",
          "lang": "French",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "tags": [
            "masculine"
          ],
          "word": "corps de décomposition"
        },
        {
          "_dis1": "44 23 22 10",
          "code": "fr",
          "lang": "French",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "tags": [
            "masculine"
          ],
          "word": "corps des racines"
        },
        {
          "_dis1": "44 23 22 10",
          "code": "fr",
          "lang": "French",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "tags": [
            "masculine"
          ],
          "word": "corps de déploiement"
        },
        {
          "_dis1": "44 23 22 10",
          "code": "de",
          "lang": "German",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "tags": [
            "masculine"
          ],
          "word": "Zerfällungskörper"
        },
        {
          "_dis1": "44 23 22 10",
          "code": "it",
          "lang": "Italian",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "tags": [
            "masculine"
          ],
          "word": "campo di spezzamento"
        },
        {
          "_dis1": "44 23 22 10",
          "code": "it",
          "lang": "Italian",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "tags": [
            "masculine"
          ],
          "word": "campo di riducibilità completa"
        },
        {
          "_dis1": "44 23 22 10",
          "code": "pt",
          "lang": "Portuguese",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "tags": [
            "masculine"
          ],
          "word": "corpo de decomposição"
        },
        {
          "_dis1": "44 23 22 10",
          "code": "pt",
          "lang": "Portuguese",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "tags": [
            "masculine"
          ],
          "word": "corpo de fatoração"
        },
        {
          "_dis1": "44 23 22 10",
          "code": "es",
          "lang": "Spanish",
          "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
          "tags": [
            "masculine"
          ],
          "word": "cuerpo de descomposición"
        }
      ]
    },
    {
      "categories": [
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          "kind": "topical",
          "langcode": "en",
          "name": "Algebra",
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      ],
      "examples": [
        {
          "text": "The terminology \"splitting field of a K-algebra\" is motivated by the same terminology regarding a polynomial. A splitting field of a K-algebra A is a field extension K#x5C;mapstoL such that A#x5C;otimes#x5F;KL is split; in the special case A#x3D;K#x5B;x#x5D;#x2F;f(x) this is the same as a splitting field of the polynomial f(x).",
          "type": "example"
        },
        {
          "text": "2001, T. Y. Lam, A First Course in Noncommutative Rings, Springer, 2nd Edition, page 117,\nEx. 7.6. For a finite-dimensional k-algebra R, let T(R)= operatorname radR+[R,R], where [R,R] denotes the subgroup of R generated by ab-ba for all a,b∈R. Assume that k has characteristic p>0. Show that\nT(R)⊆a∈R:aforsomem>1,\nwith equality if k is a splitting field for R."
        },
        {
          "ref": "2016, Peter Webb, A Course in Finite Group Representation Theory, Cambridge University Press, page 162",
          "text": "Group algebras are defined over the prime field #x5C;Q or #x5C;mathbbF#x5F;p (depending on the characteristic), and by what we have just proved #x5C;QG and #x5C;mathbbF#x5F;pG have splitting fields that are finite degree extensions of the prime field.[…]\nSome other basic facts about splitting fields are left to the exercises at the end of this chapter. Thus, if A is a finite-dimensional algebra over a field F that is a splitting field for A and E#x5C;supsetF is a field extension, it is the case that every simple E#x5C;otimes#x5F;FA-module can be written in F (Exercises 4 and 8).",
          "type": "quotation"
        }
      ],
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        "Given a finite-dimensional K-algebra (algebra over a field), an extension field whose every simple (indecomposable) module is absolutely simple (remains simple after the scalar field has been extended to said extension field)."
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        "(algebra, ring theory, of a K-algebra) Given a finite-dimensional K-algebra (algebra over a field), an extension field whose every simple (indecomposable) module is absolutely simple (remains simple after the scalar field has been extended to said extension field)."
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      "examples": [
        {
          "text": "Every finite dimensional central simple algebra has a splitting field: moreover, if said CSA is a division algebra, then a maximal subfield of it is a splitting field.",
          "type": "example"
        },
        {
          "text": "1955, Shimshon A. Amitsur, Generic Splitting Fields of Central Simple Algebras, Annals of Mathematics, Volume 62, Number 1, Reprinted in 2001, Avinoam Mann, Amitai Regev, Louis Rowen, David J. Saltman, Lance W. Small (editors), Selected Papers of S. A. Amitsur with Commentary, Part 2, American Mathematical Society, page 199,\nThe main tool in studying the structure of division algebras, or more generally, of central simple algebras (c.s.as) over a field ℭ are the extensions of ℭ that split the algebras. A field 𝔉⊇ℭ is said to split a c.s.a. 𝔄 if 𝔄⊗𝔉 is a total matrix ring over 𝔉. The present study is devoted to the study of the set of all splitting fields of a given c.s.a. 𝔄."
        }
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      "glosses": [
        "Given a central simple algebra A over a field K, another field, E, such that the tensor product A⊗E is isomorphic to a matrix ring over E."
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        "(algebra, ring theory, of a central simple algebra) Given a central simple algebra A over a field K, another field, E, such that the tensor product A⊗E is isomorphic to a matrix ring over E."
      ],
      "raw_tags": [
        "of a central simple algebra"
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      "examples": [
        {
          "text": "1999, P. Shumyatsky, V. Zobina (translators), David Louvish (editor of translation), Ya. G. Berkovich, E. M. Zhmud’, Characters of Finite Groups, Volume 2, American Mathematical Society, page 165,\nDEFINITION 2. A field K is called a splitting field of a character χ of a group G if χ∈ operatorname Char_K(G), i.e., χ is afforded by a K-representation of G.\nLet T be a representation of G affording the character χ. It follows from Definition 2 that K is a splitting field of χ if and only if T is equivalent to Δ, where Δ is a K-representation of G. In other words, K is a splitting field of a character χ if and only if a representation T affording χ is realized over K. Every character of G has a splitting field (for example, C is a splitting field of any character of G). If K is a splitting field of both characters χ₁,χ₂, then K is a splitting field of χ₁+χ₂, Therefore, in studying splitting fields, we may consider irreducible characters only.\nDEFINITION 3. A field K is called a splitting field of a group G if it is a splitting field for every χ∈ operatorname Irr(G)."
        }
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      "glosses": [
        "(of a character χ of a representation of a group G) A field K over which a K-representation of G exists which includes the character χ; (of a group G) a field over which a K-representation of G exists which includes every irreducible character in G."
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        "(algebra, character theory) (of a character χ of a representation of a group G) A field K over which a K-representation of G exists which includes the character χ; (of a group G) a field over which a K-representation of G exists which includes every irreducible character in G."
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  "wikipedia": [
    "splitting field"
  ],
  "word": "splitting field"
}

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      "word": "split K-algebra"
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          "ref": "1974, Thomas W. Hungerford, Algebra, Springer, page 258",
          "text": "Theorem 3.2. If K is a field and f#x5C;inK#x5B;x#x5D; has degree n#x5C;ge 1, then there exists a splitting field F of f with #x5B;F#x3A;K#x5D;#x5C;len#x21;",
          "type": "quotation"
        },
        {
          "ref": "2003, Derek J. S. Robinson, An Introduction to Abstract Algebra, Walter de Gruyter, page 130",
          "text": "In the case of the polynomial t²#x2B;1#x5C;in#x5C;R#x5B;t#x5D;, the situation is quite clear; its splitting field is #x5C;C since t²#x2B;1#x3D;(t#x2B;i)(t-i) where i#x3D;#x5C;sqrt#x7B;-1#x7D;.",
          "type": "quotation"
        },
        {
          "ref": "2009, Paolo Aluffi, Algebra: Chapter 0, American Mathematical Society, page 430",
          "text": "Example 4.3. By definition, #x5C;Q(i) is the splitting field of x²#x2B;1 over #x5C;Q, and #x5C;C is the splitting field for the same polynomial, over #x5C;R.\nExample 4.4. The splitting field F of x⁸-1 over #x5C;Q is generated by #x5C;zeta#x3A;#x3D;2#x7B;2#x5C;pii#x2F;8#x7D;; indeed, the roots of x⁸-1 are all the 8-th roots of 1, and all of them are powers of #x5C;zeta:[…]In fact, #x5C;zeta is a root of the polynomial x⁴#x2B;1, which is irreducible over #x5C;Q; therefore F#x3D;#x5C;Q(#x5C;zeta) is 'already' the splitting field of x⁴#x2B;1.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "(of a polynomial) Given a polynomial p over a field K, the smallest extension field L of K such that p, as a polynomial over L, decomposes into linear factors (polynomials of degree 1); (of a set of polynomials) given a set P of polynomials over K, the smallest extension field of K over which every polynomial in P decomposes into linear factors."
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        "(algebra, Galois theory) (of a polynomial) Given a polynomial p over a field K, the smallest extension field L of K such that p, as a polynomial over L, decomposes into linear factors (polynomials of degree 1); (of a set of polynomials) given a set P of polynomials over K, the smallest extension field of K over which every polynomial in P decomposes into linear factors."
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          "text": "The terminology \"splitting field of a K-algebra\" is motivated by the same terminology regarding a polynomial. A splitting field of a K-algebra A is a field extension K#x5C;mapstoL such that A#x5C;otimes#x5F;KL is split; in the special case A#x3D;K#x5B;x#x5D;#x2F;f(x) this is the same as a splitting field of the polynomial f(x).",
          "type": "example"
        },
        {
          "text": "2001, T. Y. Lam, A First Course in Noncommutative Rings, Springer, 2nd Edition, page 117,\nEx. 7.6. For a finite-dimensional k-algebra R, let T(R)= operatorname radR+[R,R], where [R,R] denotes the subgroup of R generated by ab-ba for all a,b∈R. Assume that k has characteristic p>0. Show that\nT(R)⊆a∈R:aforsomem>1,\nwith equality if k is a splitting field for R."
        },
        {
          "ref": "2016, Peter Webb, A Course in Finite Group Representation Theory, Cambridge University Press, page 162",
          "text": "Group algebras are defined over the prime field #x5C;Q or #x5C;mathbbF#x5F;p (depending on the characteristic), and by what we have just proved #x5C;QG and #x5C;mathbbF#x5F;pG have splitting fields that are finite degree extensions of the prime field.[…]\nSome other basic facts about splitting fields are left to the exercises at the end of this chapter. Thus, if A is a finite-dimensional algebra over a field F that is a splitting field for A and E#x5C;supsetF is a field extension, it is the case that every simple E#x5C;otimes#x5F;FA-module can be written in F (Exercises 4 and 8).",
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        "(algebra, ring theory, of a K-algebra) Given a finite-dimensional K-algebra (algebra over a field), an extension field whose every simple (indecomposable) module is absolutely simple (remains simple after the scalar field has been extended to said extension field)."
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          "text": "Every finite dimensional central simple algebra has a splitting field: moreover, if said CSA is a division algebra, then a maximal subfield of it is a splitting field.",
          "type": "example"
        },
        {
          "text": "1955, Shimshon A. Amitsur, Generic Splitting Fields of Central Simple Algebras, Annals of Mathematics, Volume 62, Number 1, Reprinted in 2001, Avinoam Mann, Amitai Regev, Louis Rowen, David J. Saltman, Lance W. Small (editors), Selected Papers of S. A. Amitsur with Commentary, Part 2, American Mathematical Society, page 199,\nThe main tool in studying the structure of division algebras, or more generally, of central simple algebras (c.s.as) over a field ℭ are the extensions of ℭ that split the algebras. A field 𝔉⊇ℭ is said to split a c.s.a. 𝔄 if 𝔄⊗𝔉 is a total matrix ring over 𝔉. The present study is devoted to the study of the set of all splitting fields of a given c.s.a. 𝔄."
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        "Given a central simple algebra A over a field K, another field, E, such that the tensor product A⊗E is isomorphic to a matrix ring over E."
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        "(algebra, ring theory, of a central simple algebra) Given a central simple algebra A over a field K, another field, E, such that the tensor product A⊗E is isomorphic to a matrix ring over E."
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      "examples": [
        {
          "text": "1999, P. Shumyatsky, V. Zobina (translators), David Louvish (editor of translation), Ya. G. Berkovich, E. M. Zhmud’, Characters of Finite Groups, Volume 2, American Mathematical Society, page 165,\nDEFINITION 2. A field K is called a splitting field of a character χ of a group G if χ∈ operatorname Char_K(G), i.e., χ is afforded by a K-representation of G.\nLet T be a representation of G affording the character χ. It follows from Definition 2 that K is a splitting field of χ if and only if T is equivalent to Δ, where Δ is a K-representation of G. In other words, K is a splitting field of a character χ if and only if a representation T affording χ is realized over K. Every character of G has a splitting field (for example, C is a splitting field of any character of G). If K is a splitting field of both characters χ₁,χ₂, then K is a splitting field of χ₁+χ₂, Therefore, in studying splitting fields, we may consider irreducible characters only.\nDEFINITION 3. A field K is called a splitting field of a group G if it is a splitting field for every χ∈ operatorname Irr(G)."
        }
      ],
      "glosses": [
        "(of a character χ of a representation of a group G) A field K over which a K-representation of G exists which includes the character χ; (of a group G) a field over which a K-representation of G exists which includes every irreducible character in G."
      ],
      "links": [
        [
          "algebra",
          "algebra"
        ],
        [
          "character theory",
          "character theory"
        ],
        [
          "representation",
          "representation"
        ],
        [
          "irreducible",
          "irreducible"
        ]
      ],
      "qualifier": "character theory",
      "raw_glosses": [
        "(algebra, character theory) (of a character χ of a representation of a group G) A field K over which a K-representation of G exists which includes the character χ; (of a group G) a field over which a K-representation of G exists which includes every irreducible character in G."
      ],
      "topics": [
        "algebra",
        "mathematics",
        "sciences"
      ]
    }
  ],
  "translations": [
    {
      "code": "eu",
      "lang": "Basque",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "word": "deskonposizio gorputz"
    },
    {
      "code": "eu",
      "lang": "Basque",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "word": "banatze gorputz"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "tags": [
        "masculine"
      ],
      "word": "corps de décomposition"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "tags": [
        "masculine"
      ],
      "word": "corps des racines"
    },
    {
      "code": "fr",
      "lang": "French",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "tags": [
        "masculine"
      ],
      "word": "corps de déploiement"
    },
    {
      "code": "de",
      "lang": "German",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "tags": [
        "masculine"
      ],
      "word": "Zerfällungskörper"
    },
    {
      "code": "it",
      "lang": "Italian",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "tags": [
        "masculine"
      ],
      "word": "campo di spezzamento"
    },
    {
      "code": "it",
      "lang": "Italian",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "tags": [
        "masculine"
      ],
      "word": "campo di riducibilità completa"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "tags": [
        "masculine"
      ],
      "word": "corpo de decomposição"
    },
    {
      "code": "pt",
      "lang": "Portuguese",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "tags": [
        "masculine"
      ],
      "word": "corpo de fatoração"
    },
    {
      "code": "es",
      "lang": "Spanish",
      "sense": "(Galois theory, of a polynomial) smallest field containing all roots",
      "tags": [
        "masculine"
      ],
      "word": "cuerpo de descomposición"
    }
  ],
  "wikipedia": [
    "splitting field"
  ],
  "word": "splitting field"
}