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  2. Gauss circle problem - Wikipedia

    en.wikipedia.org/wiki/Gauss_circle_problem

    Gauss's circle problem asks how many points there are inside this circle of the form (,) where and are both integers. Since the equation of this circle is given in Cartesian coordinates by x 2 + y 2 = r 2 {\displaystyle x^{2}+y^{2}=r^{2}} , the question is equivalently asking how many pairs of integers m and n there are such that

  3. Circular error probable - Wikipedia

    en.wikipedia.org/wiki/Circular_error_probable

    Thus the MSE results from pooling all these sources of error, geometrically corresponding to radius of a circle within which 50% of rounds will land. Several methods have been introduced to estimate CEP from shot data.

  4. Gaussian integral - Wikipedia

    en.wikipedia.org/wiki/Gaussian_integral

    A different technique, which goes back to Laplace (1812), [3] is the following. Let = =. Since the limits on s as y → ±∞ depend on the sign of x, it simplifies the calculation to use the fact that e −x 2 is an even function, and, therefore, the integral over all real numbers is just twice the integral from zero to infinity.

  5. Error function - Wikipedia

    en.wikipedia.org/wiki/Error_function

    x erf x 1 − erf x; 0: 0: 1: 0.02: 0.022 564 575: 0.977 435 425: 0.04: 0.045 111 106: 0.954 888 894: 0.06: 0.067 621 594: 0.932 378 406: 0.08: 0.090 078 126: 0.909 ...

  6. Analytic number theory - Wikipedia

    en.wikipedia.org/wiki/Analytic_number_theory

    An important example is the Gauss circle problem, which asks for integers points (x y) which satisfy +. In geometrical terms, given a circle centered about the origin in the plane with radius r, the problem asks how many

  7. 50 Surprising Facts From “Today I Learned” That Show How ...

    www.aol.com/80-today-learned-facts-too-020048179...

    Image credits: Headpuncher #2. TIL Danny Trejo has a clause in his movie contracts that requires his villainous characters to die by the end of the film. He wants children to learn that crime ...

  8. Propagation of uncertainty - Wikipedia

    en.wikipedia.org/wiki/Propagation_of_uncertainty

    Any non-linear differentiable function, (,), of two variables, and , can be expanded as + +. If we take the variance on both sides and use the formula [11] for the variance of a linear combination of variables ⁡ (+) = ⁡ + ⁡ + ⁡ (,), then we obtain | | + | | +, where is the standard deviation of the function , is the standard deviation of , is the standard deviation of and = is the ...

  9. Why is housing so expensive? There simply aren't enough homes.

    www.aol.com/why-housing-expensive-simply-arent...

    Housing is too expensive, if there are options even available. Here's a breakdown of what's going on.