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  2. Proofs involving ordinary least squares - Wikipedia

    en.wikipedia.org/wiki/Proofs_involving_ordinary...

    The normal equations can be derived directly from a matrix representation of the problem as follows. The objective is to minimize = ‖ ‖ = () = +.Here () = has the dimension 1x1 (the number of columns of ), so it is a scalar and equal to its own transpose, hence = and the quantity to minimize becomes

  3. New Revised Standard Version - Wikipedia

    en.wikipedia.org/wiki/New_Revised_Standard_Version

    The New Revised Standard Version Catholic Edition (NRSV-CE) is an edition of the NRSV for Catholics. It contains all the canonical books of Scripture accepted by the Catholic Church arranged in the traditional Catholic order. Because of the presence of Catholic scholars on the original NRSV translation team, no other changes to the text were ...

  4. Quadratic formula - Wikipedia

    en.wikipedia.org/wiki/Quadratic_formula

    The roots of the quadratic function y = ⁠ 1 / 2 ⁠ x 2 − 3x + ⁠ 5 / 2 ⁠ are the places where the graph intersects the x-axis, the values x = 1 and x = 5. They can be found via the quadratic formula. In elementary algebra, the quadratic formula of math solving basic integral outputs 1 is a closed-form expression describing the solutions ...

  5. No Redeeming Social Value - Wikipedia

    en.wikipedia.org/wiki/No_Redeeming_Social_Value

    No Redeeming Social Value, also known as NRSV, is an American hardcore punk band. The band was started in 1988 by the brothers D Thrilla and K9 the sonic Maximizer of the Queens Village neighborhood of New York City .

  6. Linear least squares - Wikipedia

    en.wikipedia.org/wiki/Linear_least_squares

    Mathematically, linear least squares is the problem of approximately solving an overdetermined system of linear equations A x = b, where b is not an element of the column space of the matrix A. The approximate solution is realized as an exact solution to A x = b', where b' is the projection of b onto the column space of A. The best ...

  7. Unit square - Wikipedia

    en.wikipedia.org/wiki/Unit_square

    In a Cartesian coordinate system with coordinates (x, y), a unit square is defined as a square consisting of the points where both x and y lie in a closed unit interval from 0 to 1. That is, a unit square is the Cartesian product I × I , where I denotes the closed unit interval.

  8. List of nonlinear ordinary differential equations - Wikipedia

    en.wikipedia.org/wiki/List_of_nonlinear_ordinary...

    Differential equations are prominent in many scientific areas. Nonlinear ones are of particular interest for their commonality in describing real-world systems and how much more difficult they are to solve compared to linear differential equations.

  9. Difference of two squares - Wikipedia

    en.wikipedia.org/wiki/Difference_of_two_squares

    Another geometric proof proceeds as follows: We start with the figure shown in the first diagram below, a large square with a smaller square removed from it. The side of the entire square is a, and the side of the small removed square is b. The area of the shaded region is . A cut is made, splitting the region into two rectangular pieces, as ...