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  2. Zeller's congruence - Wikipedia

    en.wikipedia.org/wiki/Zeller's_congruence

    These formulas are based on the observation that the day of the week progresses in a predictable manner based upon each subpart of that date. Each term within the formula is used to calculate the offset needed to obtain the correct day of the week. For the Gregorian calendar, the various parts of this formula can therefore be understood as follows:

  3. List of Easter eggs in Microsoft products - Wikipedia

    en.wikipedia.org/wiki/List_of_Easter_eggs_in...

    Microsoft Excel contained a hidden Doom-like mini-game called "The Hall of Tortured Souls", a series of rooms featuring the names and faces of the developers. [19] The mini-game generated some controversy when chain emails made spurious claims and conspiracy theories accusing Microsoft—particularly Bill Gates —of hiding Satanic symbolism ...

  4. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    Microsoft Excel is a spreadsheet editor developed by Microsoft for Windows, macOS, Android, iOS and iPadOS.It features calculation or computation capabilities, graphing tools, pivot tables, and a macro programming language called Visual Basic for Applications (VBA).

  5. Manage AOL Calendar settings

    help.aol.com/articles/aol-calendar-settings-manage

    A calendar is only as good as the info it displays. Personalize the time zone, default view, and hours you're typically available on your calendar. 1. Sign in to AOL Mail. 2. Under your username click Options | Mail Settings. 3. Click Calendar. 4. Update your default view, time zone, or display settings. 5. Click Save Settings.

  6. Fast inverse square root - Wikipedia

    en.wikipedia.org/wiki/Fast_inverse_square_root

    Lighting and reflection calculations, as in the video game OpenArena, use the fast inverse square root code to compute angles of incidence and reflection.. Fast inverse square root, sometimes referred to as Fast InvSqrt() or by the hexadecimal constant 0x5F3759DF, is an algorithm that estimates , the reciprocal (or multiplicative inverse) of the square root of a 32-bit floating-point number in ...

  7. MagicDraw - Wikipedia

    en.wikipedia.org/wiki/MagicDraw

    Model refactoring like code refactoring is the disciplined technique used for modifying or improving an existing model. The following refactoring functions are available in MagicDraw: Element conversion; Relationship direction reversion; Diagram extraction (this function is available only for the activity and composite structure diagrams)

  8. Magic Mirror (M. C. Escher) - Wikipedia

    en.wikipedia.org/wiki/Magic_Mirror_(M._C._Escher)

    Magic Mirror is a lithograph print by the Dutch artist M. C. Escher first printed in January, 1946. It depicts a mirror standing vertically on wooden supports on a tiled surface. The perspective is looking down at an angle at the right hand side of the mirror. There is a sphere at each side of the mirror.

  9. Lie derivative - Wikipedia

    en.wikipedia.org/wiki/Lie_derivative

    valid for any vector fields X and Y and any tensor field T.. Considering vector fields as infinitesimal generators of flows (i.e. one-dimensional groups of diffeomorphisms) on M, the Lie derivative is the differential of the representation of the diffeomorphism group on tensor fields, analogous to Lie algebra representations as infinitesimal representations associated to group representation ...