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  2. Matrix (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Matrix_(mathematics)

    Matrix (mathematics) An m × n matrix: the m rows are horizontal and the n columns are vertical. Each element of a matrix is often denoted by a variable with two subscripts. For example, a2,1 represents the element at the second row and first column of the matrix. In mathematics, a matrix ( pl.: matrices) is a rectangular array or table of ...

  3. Geometry - Wikipedia

    en.wikipedia.org/wiki/Geometry

    v. t. e. Geometry (from Ancient Greek γεωμετρία (geōmetría) 'land measurement'; from γῆ (gê) 'earth, land' and μέτρον (métron) 'a measure') [ 1] is a branch of mathematics concerned with properties of space such as the distance, shape, size, and relative position of figures. [ 2] Geometry is, along with arithmetic, one of ...

  4. Complex number - Wikipedia

    en.wikipedia.org/wiki/Complex_number

    Complex number. A complex number can be visually represented as a pair of numbers (a, b) forming a vector on a diagram called an Argand diagram, representing the complex plane. Re is the real axis, Im is the imaginary axis, and i is the "imaginary unit", that satisfies i2 = −1. In mathematics, a complex number is an element of a number system ...

  5. Pixel 4 XL vs. the competition: The six-inch flagships - Engadget

    www.engadget.com/2019-10-15-pixel-4-xl-vs-the...

    For our final verdict, keep an eye out for Engadget's full review of the Pixel 4 XL later this month. Engadget. Login. Reviews. Best in Tech; Hands-On; View all Reviews; Buying Guides.

  6. Golden ratio - Wikipedia

    en.wikipedia.org/wiki/Golden_ratio

    The golden ratio is also an algebraic number and even an algebraic integer. It has minimal polynomial. This quadratic polynomial has two roots, and. The golden ratio is also closely related to the polynomial. which has roots and As the root of a quadratic polynomial, the golden ratio is a constructible number.

  7. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    A-plusses, if given, are usually assigned a value of 4.0 (equivalent to an A) due to the common assumption that a 4.00 is the best possible grade-point average, although 4.33 is awarded at some institutions. In some places, .25 or .3 instead of .33 is added for a plus grade and subtracted for a minus grade.

  8. History of education in the United States - Wikipedia

    en.wikipedia.org/wiki/History_of_education_in...

    This was known as "eighth grade school" [37] After 1900, some cities began to establish high schools, primarily for middle class whites. In the 1930s roughly one fourth of the US population still lived and worked on farms and few rural Southerners of either race went beyond the 8th grade until after 1945. [38] [39] [40] [41]

  9. USB 4 will support full-throttle DisplayPort 2.0 speeds

    www.engadget.com/usb-4-displayport2-8k-hdr...

    DisplayPort Alt Mode 2.0 can transmit up to 80 Gbps and should appear in 2021. USB 4 is just around the corner and ready to leave USB 3.2 in the dust with double the speeds. Now, VESA has ...

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