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  2. AM–GM inequality - Wikipedia

    en.wikipedia.org/wiki/AM–GM_inequality

    In two dimensions, 2x 1 + 2x 2 is the perimeter of a rectangle with sides of length x 1 and x 2. Similarly, 4 √ x 1 x 2 is the perimeter of a square with the same area, x 1 x 2, as that rectangle. Thus for n = 2 the AM–GM inequality states that a rectangle of a given area has the smallest perimeter if that rectangle is also a square.

  3. Algebraic closure - Wikipedia

    en.wikipedia.org/wiki/Algebraic_closure

    In the same way, an extension K 2 of K 1 can be constructed, etc. The union of all these extensions is the algebraic closure of K , because any polynomial with coefficients in this new field has its coefficients in some K n with sufficiently large n , and then its roots are in K n +1 , and hence in the union itself.

  4. Triangle inequality - Wikipedia

    en.wikipedia.org/wiki/Triangle_inequality

    The first of these quadratic inequalities requires r to range in the region beyond the value of the positive root of the quadratic equation r 2 + r − 1 = 0, i.e. r > φ − 1 where φ is the golden ratio. The second quadratic inequality requires r to range between 0 and the positive root of the quadratic equation r 2 − r − 1 = 0, i.e. 0 ...

  5. Markov's inequality - Wikipedia

    en.wikipedia.org/wiki/Markov's_inequality

    If X is a nonnegative random variable and a > 0, and U is a uniformly distributed random variable on [,] that is independent of X, then [4] ⁡ ⁡ (). Since U is almost surely smaller than one, this bound is strictly stronger than Markov's inequality.

  6. Cramer's rule - Wikipedia

    en.wikipedia.org/wiki/Cramer's_rule

    In the 2×2 case, if the coefficient determinant is zero, then the system is inconsistent if the numerator determinants are nonzero, or indeterminate if the numerator determinants are zero. For 3×3 or higher systems, the only thing one can say when the coefficient determinant equals zero is that if any of the numerator determinants are nonzero ...

  7. Quadratic equation - Wikipedia

    en.wikipedia.org/wiki/Quadratic_equation

    Because (a + 1) 2 = a, a + 1 is the unique solution of the quadratic equation x 2 + a = 0. On the other hand, the polynomial x 2 + ax + 1 is irreducible over F 4, but it splits over F 16, where it has the two roots ab and ab + a, where b is a root of x 2 + x + a in F 16. This is a special case of Artin–Schreier theory.

  8. Huawei Mate 10 - Wikipedia

    en.wikipedia.org/wiki/Huawei_Mate_10

    The Mate 10 series is powered by Huawei's all-new AI-focused processor, the Kirin 970.Kirin 970 is a 64-bit octa-core 2.36/1.8 GHz mobile ARM LTE SoC with a 12-core Mali G72 GPU and an onboard Neural processing unit (NPU).

  9. Power of 10 - Wikipedia

    en.wikipedia.org/wiki/Power_of_10

    Visualisation of powers of 10 from one to 1 trillion. In mathematics, a power of 10 is any of the integer powers of the number ten; in other words, ten multiplied by itself a certain number of times (when the power is a positive integer).