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  2. List of periodic functions - Wikipedia

    en.wikipedia.org/wiki/List_of_periodic_functions

    This is a list of some well-known periodic functions.The constant function f (x) = c, where c is independent of x, is periodic with any period, but lacks a fundamental period.

  3. Periodic function - Wikipedia

    en.wikipedia.org/wiki/Periodic_function

    Consider that for a simple sinusoid, T = 1 ⁄ f. Therefore, the LCD can be seen as a periodicity multiplier. For set representing all notes of Western major scale: [1 9 ⁄ 8 5 ⁄ 4 4 ⁄ 3 3 ⁄ 2 5 ⁄ 3 15 ⁄ 8] the LCD is 24 therefore T = 24 ⁄ f. For set representing all notes of a major triad: [1 5 ⁄ 4 3 ⁄ 2] the LCD is 4 ...

  4. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    A mathematical constant is a key number whose value is fixed by an unambiguous definition, often referred to by a symbol (e.g., an alphabet letter), or by mathematicians' names to facilitate using it across multiple mathematical problems. [1]

  5. Worksheet - Wikipedia

    en.wikipedia.org/wiki/Worksheet

    The form comes with two worksheets, one to calculate exemptions, and another to calculate the effects of other income (second job, spouse's job). The bottom number in each worksheet is used to fill out two if the lines in the main W4 form. The main form is filed with the employer, and the worksheets are discarded or held by the employee.

  6. List of letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/List_of_letters_used_in...

    Latin and Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities.

  7. Fourier series - Wikipedia

    en.wikipedia.org/wiki/Fourier_series

    The equivalence of Eq.4 and Eq.1 follows from the trigonometric identity: ⁡ = ⁡ ⁡ + ⁡ ⁡ (), which implies [25] = ⁡ = ⁡ () Fig 2. The blue curve is the cross-correlation of a square wave and a cosine template, as the phase lag of the template varies over one cycle.