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  2. Complex number - Wikipedia

    en.wikipedia.org/wiki/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 i 2 = −1.

  3. Scientific calculator - Wikipedia

    en.wikipedia.org/wiki/Scientific_calculator

    Casio fx-77, a solar-powered digital calculator from the 1980s using a single-line LCD. A scientific calculator is an electronic calculator, either desktop or handheld, designed to perform calculations using basic (addition, subtraction, multiplication, division) and advanced (trigonometric, hyperbolic, etc.) mathematical operations and functions.

  4. Indra's Pearls (book) - Wikipedia

    en.wikipedia.org/wiki/Indra's_Pearls_(book)

    The language of symmetry – an introduction to the mathematical concept of symmetry and its relation to geometric groups. Chapter 2. A delightful fiction – an introduction to complex numbers and mappings of the complex plane and the Riemann sphere. Chapter 3. Double spirals and Möbius maps – Möbius transformations and their ...

  5. Multicomplex number - Wikipedia

    en.wikipedia.org/wiki/Multicomplex_number

    In mathematics, the multicomplex number systems are defined inductively as follows: Let C 0 be the real number system. For every n > 0 let i n be a square root of −1, that is, an imaginary unit .

  6. Complex-base system - Wikipedia

    en.wikipedia.org/wiki/Complex-base_system

    Binary coding systems of complex numbers, i.e. systems with the digits = {,}, are of practical interest. [9] Listed below are some coding systems , (all are special cases of the systems above) and resp. codes for the (decimal) numbers −1, 2, −2, i. The standard binary (which requires a sign, first line) and the "negabinary" systems (second ...

  7. Calculator - Wikipedia

    en.wikipedia.org/wiki/Calculator

    The tube technology of the ANITA was superseded in June 1963 by the U.S. manufactured Friden EC-130, which had an all-transistor design, a stack of four 13-digit numbers displayed on a 5-inch (13 cm) cathode-ray tube (CRT), and introduced Reverse Polish Notation (RPN) to the calculator market for a price of $2200, which was about three times ...

  8. Euler's formula - Wikipedia

    en.wikipedia.org/wiki/Euler's_formula

    In fact, the same proof shows that Euler's formula is even valid for all complex numbers x. A point in the complex plane can be represented by a complex number written in cartesian coordinates. Euler's formula provides a means of conversion between cartesian coordinates and polar coordinates. The polar form simplifies the mathematics when used ...

  9. Complex Number Calculator - Wikipedia

    en.wikipedia.org/?title=Complex_Number...

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