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  2. Conjugate transpose - Wikipedia

    en.wikipedia.org/wiki/Conjugate_transpose

    The conjugate transpose of a matrix with real entries reduces to the transpose of , as the conjugate of a real number is the number itself. The conjugate transpose can be motivated by noting that complex numbers can be usefully represented by 2 × 2 {\displaystyle 2\times 2} real matrices, obeying matrix addition and multiplication: a + i b ≡ ...

  3. Complex conjugate - Wikipedia

    en.wikipedia.org/wiki/Complex_conjugate

    Geometric representation (Argand diagram) of and its conjugate ¯ in the complex plane.The complex conjugate is found by reflecting across the real axis.. In mathematics, the complex conjugate of a complex number is the number with an equal real part and an imaginary part equal in magnitude but opposite in sign.

  4. Integer partition - Wikipedia

    en.wikipedia.org/wiki/Integer_partition

    They are arranged so that images under the reflection about the main diagonal of the square are conjugate partitions. Partitions of n with largest part k. In number theory and combinatorics, a partition of a non-negative integer n, also called an integer partition, is a way of writing n as a sum of positive integers.

  5. Quaternion - Wikipedia

    en.wikipedia.org/wiki/Quaternion

    The norm of a quaternion (the square root of the product with its conjugate, as with complex numbers) is the square root of the determinant of the corresponding matrix. [30] The scalar part of a quaternion is one half of the matrix trace. The conjugate of a quaternion corresponds to the conjugate transpose of the matrix.

  6. Gaussian integer - Wikipedia

    en.wikipedia.org/wiki/Gaussian_integer

    The other prime numbers are not Gaussian primes, but each is the product of two conjugate Gaussian primes. A Gaussian integer a + bi is a Gaussian prime if and only if either: one of a, b is zero and the absolute value of the other is a prime number of the form 4n + 3 (with n a nonnegative integer), or

  7. Complex normal distribution - Wikipedia

    en.wikipedia.org/wiki/Complex_normal_distribution

    where denotes matrix transpose of , and denotes conjugate transpose. [ 3 ] : p. 504 [ 4 ] : pp. 500 Here the location parameter μ {\displaystyle \mu } is a n-dimensional complex vector; the covariance matrix Γ {\displaystyle \Gamma } is Hermitian and non-negative definite ; and, the relation matrix or pseudo-covariance matrix C {\displaystyle ...

  8. Powell's method - Wikipedia

    en.wikipedia.org/wiki/Powell's_method

    Powell's method, strictly Powell's conjugate direction method, is an algorithm proposed by Michael J. D. Powell for finding a local minimum of a function. The function need not be differentiable, and no derivatives are taken. The function must be a real-valued function of a fixed number of real-valued inputs. The caller passes in the initial point.

  9. Complex conjugate of a vector space - Wikipedia

    en.wikipedia.org/wiki/Complex_conjugate_of_a...

    The letter stands for a vector in , is a complex number, and ¯ denotes the complex conjugate of . [1] More concretely, the complex conjugate vector space is the same underlying real vector space (same set of points, same vector addition and real scalar multiplication) with the conjugate linear complex structure J {\displaystyle J} (different ...