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  2. Kronecker symbol - Wikipedia

    en.wikipedia.org/wiki/Kronecker_symbol

    On the other hand, the Kronecker symbol does not have the same connection to quadratic residues as the Jacobi symbol. In particular, the Kronecker symbol ( a n ) {\displaystyle \left({\tfrac {a}{n}}\right)} for n ≡ 2 ( mod 4 ) {\displaystyle n\equiv 2{\pmod {4}}} can take values independently on whether a {\displaystyle a} is a quadratic ...

  3. Kronecker delta - Wikipedia

    en.wikipedia.org/wiki/Kronecker_delta

    The generalized Kronecker delta or multi-index Kronecker delta of order is a type (,) tensor that is completely antisymmetric in its upper indices, and also in its lower indices. Two definitions that differ by a factor of p ! {\displaystyle p!} are in use.

  4. Jacobi symbol - Wikipedia

    en.wikipedia.org/wiki/Jacobi_symbol

    The following facts, even the reciprocity laws, are straightforward deductions from the definition of the Jacobi symbol and the corresponding properties of the Legendre symbol. [2] The Jacobi symbol is defined only when the upper argument ("numerator") is an integer and the lower argument ("denominator") is a positive odd integer. 1.

  5. Kronecker product - Wikipedia

    en.wikipedia.org/wiki/Kronecker_product

    In mathematics, the Kronecker product, sometimes denoted by ⊗, is an operation on two matrices of arbitrary size resulting in a block matrix.It is a specialization of the tensor product (which is denoted by the same symbol) from vectors to matrices and gives the matrix of the tensor product linear map with respect to a standard choice of basis.

  6. Symbol (number theory) - Wikipedia

    en.wikipedia.org/wiki/Symbol_(number_theory)

    Kronecker symbol defined for b any integer, a an integer, and takes values 0, 1, or −1. An extension of the Jacobi and Legendre symbols to more general values of b . Power residue symbol ( a b ) = ( a b ) m {\displaystyle \left({\frac {a}{b}}\right)=\left({\frac {a}{b}}\right)_{m}} is defined for a in some global field containing the m th ...

  7. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    A mathematical symbol is a figure or a combination of figures that is used to represent a mathematical object, an action on mathematical objects, a relation between mathematical objects, or for structuring the other symbols that occur in a formula. As formulas are entirely constituted with symbols of various types, many symbols are needed for ...

  8. Integer factorization - Wikipedia

    en.wikipedia.org/wiki/Integer_factorization

    Denote by P Δ the set of all primes q with Kronecker symbol (⁠ Δ / q ⁠) = 1. By constructing a set of generators of G Δ and prime forms f q of G Δ with q in P Δ a sequence of relations between the set of generators and f q are produced. The size of q can be bounded by c 0 (log| Δ |) 2 for some constant c 0.

  9. Dirac delta function - Wikipedia

    en.wikipedia.org/wiki/Dirac_delta_function

    It is called the delta function because it is a continuous analogue of the Kronecker delta function, which is usually defined on a discrete domain and takes values 0 and 1. The mathematical rigor of the delta function was disputed until Laurent Schwartz developed the theory of distributions, where it is defined as a linear form acting on functions.