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  2. Harmonic number - Wikipedia

    en.wikipedia.org/wiki/Harmonic_number

    By this construction, the function that defines the harmonic number for complex values is the unique function that simultaneously satisfies (1) H 0 = 0, (2) H x = H x−1 + 1/x for all complex numbers x except the non-positive integers, and (3) lim m→+∞ (H m+x − H m) = 0 for all complex values x.

  3. Kempner series - Wikipedia

    en.wikipedia.org/wiki/Kempner_series

    The series is counterintuitive [1] because, unlike the harmonic series, it converges. Kempner showed the sum of this series is less than 90. Kempner showed the sum of this series is less than 90. Baillie [ 4 ] showed that, rounded to 20 decimals, the actual sum is 22.92067 66192 64150 34816 (sequence A082838 in the OEIS ).

  4. Table of spherical harmonics - Wikipedia

    en.wikipedia.org/wiki/Table_of_spherical_harmonics

    Below the complex spherical harmonics are represented on 2D plots with the azimuthal angle, , on the horizontal axis and the polar angle, , on the vertical axis.The saturation of the color at any point represents the magnitude of the spherical harmonic and the hue represents the phase.

  5. Point code - Wikipedia

    en.wikipedia.org/wiki/Point_code

    An SS7 point code is an address for the SS7 telephone switching system. It is similar to an IP address in an IP network. It is a unique address for a node (Signaling Point, or SP), used in MTP layer 3 to identify the destination of a message signal unit (MSU).

  6. Chart pattern - Wikipedia

    en.wikipedia.org/wiki/Chart_pattern

    The recognition of the pattern is subjective and programs that are used for charting have to rely on predefined rules to match the pattern. There are 42 recognized patterns that can be split into simple and complex patterns. Steve Nison is the person who introduced candlesticks to the West. [4] Below is a list of commonly used candlestick patterns:

  7. Takeaways from Trump's pre-inauguration rally speech - AOL

    www.aol.com/takeaways-trumps-pre-inauguration...

    On the eve of his inauguration, President-elect Donald Trump staged a campaign-style rally in frigid Washington where he and his supporters celebrated his win. As he has been signaling for weeks ...

  8. 5 convicted in Amsterdam over violence against Israeli soccer ...

    www.aol.com/news/5-convicted-netherlands-over...

    A Dutch court convicted five men Tuesday for their part in last month's violence against Israeli soccer fans in Amsterdam that shocked the world and sparked accusations of antisemitism. The ...

  9. Harmonic analysis - Wikipedia

    en.wikipedia.org/wiki/Harmonic_analysis

    Harmonic analysis is a branch of mathematics concerned with investigating the connections between a function and its representation in frequency.The frequency representation is found by using the Fourier transform for functions on unbounded domains such as the full real line or by Fourier series for functions on bounded domains, especially periodic functions on finite intervals.