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  2. Square root - Wikipedia

    en.wikipedia.org/wiki/Square_root

    The square of any positive or negative number is positive, and the square of 0 is 0. Therefore, no negative number can have a real square root. However, it is possible to work with a more inclusive set of numbers, called the complex numbers, that does contain solutions to the square

  3. Mathematical fallacy - Wikipedia

    en.wikipedia.org/wiki/Mathematical_fallacy

    The square root is multivalued. One value can be chosen by convention as the principal value; in the case of the square root the non-negative value is the principal value, but there is no guarantee that the square root given as the principal value of the square of a number will be equal to the original number (e.g. the principal square root of ...

  4. Quantum mechanics of time travel - Wikipedia

    en.wikipedia.org/wiki/Quantum_mechanics_of_time...

    In 1991, David Deutsch proposed a method to explain how quantum systems interact with closed timelike curves (CTCs) using time evolution equations. This method aims to address paradoxes like the grandfather paradox, [10] [11] which suggests that a time traveler who stops their own birth would create a contradiction.

  5. List of probability distributions - Wikipedia

    en.wikipedia.org/wiki/List_of_probability...

    The rectified Gaussian distribution replaces negative values from a normal distribution with a discrete component at zero. The compound poisson-gamma or Tweedie distribution is continuous over the strictly positive real numbers, with a mass at zero.

  6. Imaginary number - Wikipedia

    en.wikipedia.org/wiki/Imaginary_number

    An imaginary number is the product of a real number and the imaginary unit i, [note 1] which is defined by its property i 2 = −1. [1] [2] The square of an imaginary number bi is −b 2. For example, 5i is an imaginary number, and its square is −25. The number zero is considered to be both real and imaginary. [3]

  7. Scientists find evidence of ‘negative time’ - AOL

    www.aol.com/news/scientists-evidence-negative...

    The results were detailed in a study, titled ‘Experimental evidence that a photon can spend a negative amount of time in an atom cloud’, which is currently awaiting peer review.

  8. Signed zero - Wikipedia

    en.wikipedia.org/wiki/Signed_zero

    Signed zero is zero with an associated sign.In ordinary arithmetic, the number 0 does not have a sign, so that −0, +0 and 0 are equivalent. However, in computing, some number representations allow for the existence of two zeros, often denoted by −0 (negative zero) and +0 (positive zero), regarded as equal by the numerical comparison operations but with possible different behaviors in ...

  9. “Time Traveler”: Viral Woman Seemingly Predicted ... - AOL

    www.aol.com/lifestyle/time-traveler-viral-woman...

    A woman on TikTok is going viral after seemingly predicting Liam Payne’s death, six days before it actually happened.. Ashtyn talked about her “newest One Direction theory” on October 10 ...