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  2. Exponentiation - Wikipedia

    en.wikipedia.org/wiki/Exponentiation

    Graphs of y = b x for various bases b: base 10, base e, base 2, base ⁠ 1 / 2 ⁠. Each curve passes through the point (0, 1) because any nonzero number raised to the power of 0 is 1. At x = 1, the value of y equals the base because any number raised to the power of 1 is the number itself.

  3. 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 is a closed-form expression describing the solutions of a quadratic equation.

  4. Cyclic number - Wikipedia

    en.wikipedia.org/wiki/Cyclic_number

    Let x = r ⋅ b Let d = int(x / p) Let r = x mod p Let n = n ⋅ b + d If r ≠ 1 then repeat the loop. if t = p − 1 then n is a cyclic number. This procedure works by computing the digits of 1/p in base b, by long division. r is the remainder at each step, and d is the digit produced. The step n = n ⋅ b + d. serves simply to collect the ...

  5. Nabarro–Herring creep - Wikipedia

    en.wikipedia.org/wiki/Nabarro–Herring_creep

    The plus and minus indication is an increase or decrease in the activation energy due to the tensile and compressive stresses, respectively. The fraction of vacancy concentrations in the compressive ( N ν C {\displaystyle N_{\nu }^{C}} ) and tensile ( N ν T {\displaystyle N_{\nu }^{T}} ) regions are given as:

  6. Pythagorean triple - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_triple

    Euclid's formula for Pythagorean triples and the inverse relationship t = y / (x + 1) mean that, except for (−1, 0), a point (x, y) on the circle is rational if and only if the corresponding value of t is a rational number. Note that t = y / (x + 1) = b / (a + c) = n / m is also the tangent of half of the angle that is opposite the triangle ...

  7. Glossary of commutative algebra - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_commutative...

    A subset X of a ring or module is called saturated with respect to a multiplicative subset S if xs in X and s in S implies that x is in X. saturation The saturation of a subset of a ring or module is the smallest saturated subset containing it. semilocal semi-local 1. A semilocal ring is a ring with only a finite number of maximal ideals. 2.

  8. APL syntax and symbols - Wikipedia

    en.wikipedia.org/wiki/APL_syntax_and_symbols

    Element in X[row 2; col 2] is changed (from 7) to a nested vector "Text" using the enclose ⊂ function. Element in X[row 3; col 4], formerly integer 14, now becomes a mini enclosed or ⊂ nested 2x2 matrix of 4 consecutive integers. Since X contains numbers, text and nested elements, it is both a mixed and a nested array.