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  2. Help:Advanced table formatting - Wikipedia

    en.wikipedia.org/wiki/Help:Advanced_table_formatting

    Solution: divide one of the tall cells so that the row gets one rowspan=1 cell (and don't mind the eventual loss of text-centering). Then kill the border between them. Don't forget to fill the cell with nothing ({}). This being the only solution that correctly preserves the cell height, matching that of the reference seven row table.

  3. Logical spreadsheet - Wikipedia

    en.wikipedia.org/wiki/Logical_spreadsheet

    A logical spreadsheet is a spreadsheet in which formulas take the form of logical constraints rather than function definitions.. In traditional spreadsheet systems, such as Excel, cells are partitioned into "directly specified" cells and "computed" cells and the formulas used to specify the values of computed cells are "functional", i.e. for every combination of values of the directly ...

  4. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    Excel offers many user interface tweaks over the earliest electronic spreadsheets; however, the essence remains the same as in the original spreadsheet software, VisiCalc: the program displays cells organized in rows and columns, and each cell may contain data or a formula, with relative or absolute references to other cells. Excel 2.0 for ...

  5. Quattro Pro - Wikipedia

    en.wikipedia.org/wiki/Quattro_Pro

    For years Quattro Pro had a competitive advantage, in regard to maximum row and column limits (allowing a maximum worksheet size of one million rows by 18,276 columns). This avoided the 65,536 row by 256 column spreadsheet limitations inherent to Microsoft Excel (prior to Excel 2007).

  6. Gimbal lock - Wikipedia

    en.wikipedia.org/wiki/Gimbal_lock

    Gimbal lock is the loss of one degree of freedom in a multi-dimensional mechanism at certain alignments of the axes. In a three-dimensional three- gimbal mechanism, gimbal lock occurs when the axes of two of the gimbals are driven into a parallel configuration, "locking" the system into rotation in a degenerate two-dimensional space.

  7. Lock number - Wikipedia

    en.wikipedia.org/wiki/Lock_number

    In helicopter aerodynamics, the Lock number is the ratio of aerodynamic forces, which act to lift the rotor blades, to inertial forces, which act to maintain the blades in the plane of rotation. [1] It is named after C. N. H. Lock , a British aerodynamicist who studied autogyros in the 1920s.

  8. Missile guidance - Wikipedia

    en.wikipedia.org/wiki/Missile_guidance

    It is based on the fact that two objects are on a collision course when the direction of their direct line-of-sight does not change. PN dictates that the missile velocity vector should rotate at a rate proportional to the rotation rate of the line of sight (line-Of-sight rate or LOS-rate) and in the same direction.

  9. LibreOffice - Wikipedia

    en.wikipedia.org/wiki/LibreOffice

    Whitespace line feed and character tabulation in cell formula expressions are now preserved and survive round-tripping between Office Open XML and ODF file formats. New "Evaluate formulas" option in the CSV Import and Paste Special and Text to Column dialog. Bash like autocompletion for Calc autoinput was implemented.