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  2. Arrow's impossibility theorem - Wikipedia

    en.wikipedia.org/wiki/Arrow's_impossibility_theorem

    Arrow's theorem assumes as background that any non-degenerate social choice rule will satisfy: [15]. Unrestricted domain – the social choice function is a total function over the domain of all possible orderings of outcomes, not just a partial function.

  3. Trachtenberg system - Wikipedia

    en.wikipedia.org/wiki/Trachtenberg_system

    The calculations for finding the fourth digit from the example above are illustrated at right. The arrow from the nine will always point to the digit of the multiplicand directly above the digit of the answer you wish to find, with the other arrows each pointing one digit to the right. Each arrow head points to a UT Pair, or Product Pair.

  4. Zeno's paradoxes - Wikipedia

    en.wikipedia.org/wiki/Zeno's_paradoxes

    In the arrow paradox, Zeno states that for motion to occur, an object must change the position which it occupies. He gives an example of an arrow in flight. He states that at any one (durationless) instant of time, the arrow is neither moving to where it is, nor to where it is not. [18]

  5. Arrow of time - Wikipedia

    en.wikipedia.org/wiki/Arrow_of_time

    The arrow of time is the "one-way direction" or "asymmetry" of time. The thermodynamic arrow of time is provided by the second law of thermodynamics, which says that in an isolated system, entropy tends to increase with time. Entropy can be thought of as a measure of microscopic disorder; thus the second law implies that time is asymmetrical ...

  6. Tetration - Wikipedia

    en.wikipedia.org/wiki/Tetration

    Solving the inverse relation, as in the previous section, yields the expected 0 i = 1 and −1 i = 0, with negative values of n giving infinite results on the imaginary axis. [ citation needed ] Plotted in the complex plane , the entire sequence spirals to the limit 0.4383 + 0.3606 i , which could be interpreted as the value where n is infinite.

  7. Newton's method in optimization - Wikipedia

    en.wikipedia.org/wiki/Newton's_method_in...

    The geometric interpretation of Newton's method is that at each iteration, it amounts to the fitting of a parabola to the graph of () at the trial value , having the same slope and curvature as the graph at that point, and then proceeding to the maximum or minimum of that parabola (in higher dimensions, this may also be a saddle point), see below.

  8. Math Arrow - Wikipedia

    en.wikipedia.org/wiki/Math_Arrow

    Unlike a number line, which extends horizontally and infinitely, the Math Arrow displays the whole numbers from 0 to 100 in a pair of parallel zigzag lines. [2] The numbers on the left-hand zigzag run from 0 at the bottom to 50 at the top; on the right-hand zigzag they run from 50 at the top to 100 at the bottom (the number 50 appears twice, at the top of both zigzags).

  9. Archer's paradox - Wikipedia

    en.wikipedia.org/wiki/Archer's_paradox

    The bending of the arrow when released is the explanation for why the paradox occurs and should not be confused with the paradox itself. Flexing of the arrow when shot from a modern 'centre shot' bow is still present and is caused by a variety of factors, mainly the way the string is deflected from the fingers as the arrow is released.