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  2. 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.

  3. List of Unicode characters - Wikipedia

    en.wikipedia.org/wiki/List_of_Unicode_characters

    Vulgar fraction one quarter 0124 U+00BD ½ 189 0302 0275 ½ Vulgar fraction one half 0125 U+00BE ¾ 190 0302 0276 ¾ Vulgar fraction three quarters 0126 U+00BF ¿ 191 0302 0277 ¿ Inverted Question Mark: 0127 Letters: Uppercase. U+00C0 À 192 0303 0200 À Latin Capital Letter A with grave: 0128 U+00C1 Á 193 0303 0201 ...

  4. 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.

  5. 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.

  6. 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.

  7. Debt-to-GDP ratio - Wikipedia

    en.wikipedia.org/wiki/Debt-to-GDP_ratio

    At the end of the 1st quarter of 2021, the United States public debt-to-GDP ratio was 127.5%. [4] Two-thirds of US public debt is owned by US citizens, banks, corporations, and the Federal Reserve Bank; [5] approximately one-third of US public debt is held by foreign countries – particularly China and Japan.

  8. Social Security (United States) - Wikipedia

    en.wikipedia.org/wiki/Social_Security_(United...

    Reduce benefits for new retirees. If Social Security benefits were reduced by 3% to 5% for new retirees, about 18% to 30% percent of the funding gap would be eliminated. [citation needed] Average in more working years. Social Security benefits are now based on an average of a worker's 35 highest paid annual salaries with zeros averaged in if ...

  9. ISO 8601 - Wikipedia

    en.wikipedia.org/wiki/ISO_8601

    To resolve ambiguity, "P1M" is a one-month duration and "PT1M" is a one-minute duration (note the time designator, T, that precedes the time value). The smallest value used may also have a decimal fraction, [39] as in "P0.5Y" to indicate half a year. This decimal fraction may be specified with either a comma or a full stop, as in "P0,5Y" or "P0 ...