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  2. Singular value decomposition - Wikipedia

    en.wikipedia.org/wiki/Singular_value_decomposition

    Top: The action of M, indicated by its effect on the unit disc D and the two canonical unit vectors e 1 and e 2. Left: The action of V ⁎, a rotation, on D, e 1, and e 2. Bottom: The action of Σ, a scaling by the singular values σ 1 horizontally and σ 2 vertically.

  3. Blinder–Oaxaca decomposition - Wikipedia

    en.wikipedia.org/wiki/Blinder–Oaxaca_decomposition

    Using Blinder–Oaxaca decomposition one can distinguish between "change of mean" contribution (purple) and "change of effect" contribution. The Blinder–Oaxaca decomposition (/ ˈ b l aɪ n d ər w ɑː ˈ h ɑː k ɑː /) or Kitagawa decomposition, is a statistical method that explains the difference in the means of a dependent variable between two groups by decomposing the gap into within ...

  4. Matrix decomposition - Wikipedia

    en.wikipedia.org/wiki/Matrix_decomposition

    Applicable to: square, hermitian, positive definite matrix Decomposition: =, where is upper triangular with real positive diagonal entries Comment: if the matrix is Hermitian and positive semi-definite, then it has a decomposition of the form = if the diagonal entries of are allowed to be zero

  5. Amicable numbers - Wikipedia

    en.wikipedia.org/wiki/Amicable_numbers

    Demonstration with Cuisenaire rods of the amicability of the pair of numbers (220,284), the first of the series.. In mathematics, the amicable numbers are two different natural numbers related in such a way that the sum of the proper divisors of each is equal to the other number.

  6. Decomposition - Wikipedia

    en.wikipedia.org/wiki/Decomposition

    Ants eating a dead snake. Decomposition begins at the moment of death, caused by two factors: autolysis, the breaking down of tissues by the body's own internal chemicals and enzymes, and putrefaction, the breakdown of tissues by bacteria.

  7. Promoting Healthy Choices: Information vs. Convenience - HuffPost

    images.huffingtonpost.com/2012-12-21-promoting...

    2 Abstract Although recent legislation has been enacted to require fast-food restaurants to display calorie information on menus, the consequences of posting such information remain unclear.

  8. Crout matrix decomposition - Wikipedia

    en.wikipedia.org/wiki/Crout_matrix_decomposition

    In linear algebra, the Crout matrix decomposition is an LU decomposition which decomposes a matrix into a lower triangular matrix (L), an upper triangular matrix (U) and, although not always needed, a permutation matrix (P).

  9. Dan Bricklin - Wikipedia

    en.wikipedia.org/wiki/Dan_Bricklin

    Dan Bricklin founded Software Garden, a small consulting firm and developer of software applications, in 1985. The company's focus was to produce and market “Dan Bricklin's Demo Program”. The program allowed users to create demonstrations of their programs before they were even written, and was also used to create tutorials for Windows ...