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  2. Vertical line test - Wikipedia

    en.wikipedia.org/wiki/Vertical_line_test

    A function can only have one output, y, for each unique input, x. If a vertical line intersects a curve on an xy-plane more than once then for one value of x the curve has more than one value of y, and so, the curve does not represent a function. If all vertical lines intersect a curve at most once then the curve represents a function. [1]

  3. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Excel maintains 15 figures in its numbers, but they are not always accurate; mathematically, the bottom line should be the same as the top line, in 'fp-math' the step '1 + 1/9000' leads to a rounding up as the first bit of the 14 bit tail '10111000110010' of the mantissa falling off the table when adding 1 is a '1', this up-rounding is not undone when subtracting the 1 again, since there is no ...

  4. Glossary of mathematical symbols - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_mathematical...

    3. Between two groups, may mean that the first one is a proper subgroup of the second one. > (greater-than sign) 1. Strict inequality between two numbers; means and is read as "greater than". 2. Commonly used for denoting any strict order. 3. Between two groups, may mean that the second one is a proper subgroup of the first one. ≤ 1.

  5. Horizontal line test - Wikipedia

    en.wikipedia.org/wiki/Horizontal_line_test

    Given a function : (i.e. from the real numbers to the real numbers), we can decide if it is injective by looking at horizontal lines that intersect the function's graph. If any horizontal line = intersects the graph in more than one point, the function is not injective. To see this, note that the points of intersection have the same y-value ...

  6. Vertical bar - Wikipedia

    en.wikipedia.org/wiki/Vertical_bar

    In chemistry, the vertical line is used in cell notation of electrochemical cells. Example, Zn | Zn 2+ || Cu 2+ | Cu Single vertical lines show components of the cell which do not mix, usually being in different phases. The double vertical line ( || ) is used to represent salt bridge; which is used to allow free moving ions to move.

  7. What Is the 'Green Line Test,' Exactly? What To Know About ...

    www.aol.com/lifestyle/green-line-test-exactly...

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  8. Implicit curve - Wikipedia

    en.wikipedia.org/wiki/Implicit_curve

    In general, implicit curves fail the vertical line test (meaning that some values of x are associated with more than one value of y) and so are not necessarily graphs of functions. However, the implicit function theorem gives conditions under which an implicit curve locally is given by the graph of a function (so in particular it has no self ...

  9. What Is the 'Green Line Test,' Exactly? What To Know About ...

    www.aol.com/green-line-test-exactly-know...

    SwiftTok is abuzz with the "green line test" in efforts to analyze Taylor Swift and Travis Kelce's relationship. However, the origins of this relationship analysis method are important to note, as ...