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  2. Cash conversion cycle - Wikipedia

    en.wikipedia.org/wiki/Cash_conversion_cycle

    Equation describes a firm that buys and sells on account. Also, the equation is written to accommodate a firm that buys and sells on account. For a cash-only firm, the equation would only need data from sales operations (e.g. changes in inventory), because disbursing cash would be directly measurable as purchase of inventory, and collecting ...

  3. Tipler cylinder - Wikipedia

    en.wikipedia.org/wiki/Tipler_cylinder

    The specificity of thirteen seconds of time reversal, along with the device having a beryllium core, are references to the science fiction comedy Galaxy Quest.) In his Warstrider series of novels, William H. Keith uses a Tipler cylinder with a length-to-width ratio of 512 that allows travel to and from the core of the Milky Way galaxy.

  4. Fictional currency - Wikipedia

    en.wikipedia.org/wiki/Fictional_currency

    Coin props depicting a fictional wizarding currency in the Harry Potter fantasy films.. Authors doing worldbuilding and creating imaginary societies have to take care when naming fictional currencies because of the associations between currency names and countries; recognizable names for currencies of the future (e.g. dollar or yen) may be used to imply how history has progressed, but would ...

  5. Time travel in fiction - Wikipedia

    en.wikipedia.org/wiki/Time_travel_in_fiction

    A time slip is a plot device in fantasy and science fiction in which a person, or group of people, seem to travel through time by unknown means. [12] [13] The idea of a time slip has been used in 19th century fantasy, an early example being Washington Irving's 1819 Rip Van Winkle, where the mechanism of time travel is an extraordinarily long sleep. [14]

  6. Historical Dictionary of Science Fiction - Wikipedia

    en.wikipedia.org/wiki/Historical_Dictionary_of...

    The Historical Dictionary of Science Fiction contains approximately 1800 entries at launch, [2] identifying the literature in which the term first appeared and subsequent uses of the term over time. [7] [3] The entries include terms used over three centuries. For example, the first recorded use of teleport is an 1878 mention in The Times of ...

  7. Mathematical fiction - Wikipedia

    en.wikipedia.org/wiki/Mathematical_fiction

    Mathematical fiction is a genre of creative fictional work in which mathematics and mathematicians play important roles. The form and the medium of the works are not important. The form and the medium of the works are not important.

  8. Snow Crash - Wikipedia

    en.wikipedia.org/wiki/Snow_Crash

    Snow Crash is a science fiction novel by the American writer Neal Stephenson, published in 1992. Like many of Stephenson's novels, its themes include history, linguistics, anthropology, archaeology, religion, computer science, politics, cryptography, memetics, and philosophy. [2] In his 1999 essay "In the Beginning...

  9. Time loop - Wikipedia

    en.wikipedia.org/wiki/Time_loop

    The time loop or temporal loop is a plot device in fiction whereby characters re-experience a span of time which is repeated, sometimes more than once, with some hope of breaking out of the cycle of repetition. [1] Time loops are constantly resetting; when a certain condition is met, such as a death of a character or a certain point in time ...