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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. 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 ...

  4. 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 ...

  5. Hypergraph - Wikipedia

    en.wikipedia.org/wiki/Hypergraph

    This hypergraph has order 7 and size 4. Here, edges do not just connect two vertices but several, and are represented by colors. Alternative representation of the hypergraph reported in the figure above, called PAOH. [1] Edges are vertical lines connecting vertices. V7 is an isolated vertex. Vertices are aligned to the left.

  6. Test functions for optimization - Wikipedia

    en.wikipedia.org/wiki/Test_functions_for...

    The test functions used to evaluate the algorithms for MOP were taken from Deb, [4] Binh et al. [5] and Binh. [6] The software developed by Deb can be downloaded, [7] which implements the NSGA-II procedure with GAs, or the program posted on Internet, [8] which implements the NSGA-II procedure with ES.

  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. Rosenbrock function - Wikipedia

    en.wikipedia.org/wiki/Rosenbrock_function

    Plot of the Rosenbrock function of two variables. Here a = 1 , b = 100 {\displaystyle a=1,b=100} , and the minimum value of zero is at ( 1 , 1 ) {\displaystyle (1,1)} . In mathematical optimization , the Rosenbrock function is a non- convex function , introduced by Howard H. Rosenbrock in 1960, which is used as a performance test problem for ...

  9. Spaces of test functions and distributions - Wikipedia

    en.wikipedia.org/wiki/Spaces_of_test_functions...

    This function is a test function on and is an element of (). The support of this function is the closed unit disk in R 2 . {\displaystyle \mathbb {R} ^{2}.} It is non-zero on the open unit disk and it is equal to 0 everywhere outside of it.