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  2. Coefficient of coincidence - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_coincidence

    This type of association is known as “negative interference”. When the coefficient of coincidence is substantially greater than 1, it is known as “high negative interference". High negative interference has been reported in bacteriophage T4 (e.g. [2] [3]) and in human immunodeficiency virus infections. [4] [5]

  3. Linkwitz–Riley filter - Wikipedia

    en.wikipedia.org/wiki/Linkwitz–Riley_filter

    This is the biggest advantage of L-R crossovers compared to even-order Butterworth crossovers, whose summed output has a +3 dB peak around the crossover frequency. Since cascading two n th -order Butterworth filters will give a (2 n ) th -order Linkwitz–Riley filter, theoretically any (2 n ) th -order Linkwitz–Riley crossover can be designed.

  4. Audio crossover - Wikipedia

    en.wikipedia.org/wiki/Audio_crossover

    An N-way loudspeaker usually has an N-way crossover to divide the signal among the drivers. A 2-way crossover consists of a low-pass and a high-pass filter. A 3-way crossover is constructed as a combination of low-pass, band-pass and high-pass filters (LPF, BPF and HPF respectively). The BPF section is in turn a combination of HPF and LPF ...

  5. Intercompany crossovers in comics - Wikipedia

    en.wikipedia.org/wiki/Intercompany_crossovers_in...

    Such occurrences within the medium of comics as opposed to other types of media are notable, given the regularity of canonical crossovers between characters and series under a single publisher, particularly in DC Comics and Marvel Comics, where they constantly affect mainstream continuity for the parties involved.

  6. Stencil (numerical analysis) - Wikipedia

    en.wikipedia.org/wiki/Stencil_(numerical_analysis)

    The Crank–Nicolson stencil for a 1D problem. In mathematics, especially the areas of numerical analysis concentrating on the numerical solution of partial differential equations, a stencil is a geometric arrangement of a nodal group that relate to the point of interest by using a numerical approximation routine.

  7. Linear recurrence with constant coefficients - Wikipedia

    en.wikipedia.org/wiki/Linear_recurrence_with...

    In mathematics (including combinatorics, linear algebra, and dynamical systems), a linear recurrence with constant coefficients [1]: ch. 17 [2]: ch. 10 (also known as a linear recurrence relation or linear difference equation) sets equal to 0 a polynomial that is linear in the various iterates of a variable—that is, in the values of the elements of a sequence.

  8. Power series solution of differential equations - Wikipedia

    en.wikipedia.org/wiki/Power_series_solution_of...

    Many times, without using auxiliary variables, there is no known way to get the power series for the solution to a system, hence the power series method alone is difficult to apply to most nonlinear equations. The power series method will give solutions only to initial value problems (opposed to boundary value problems), this is not an issue ...

  9. HP 35s - Wikipedia

    en.wikipedia.org/wiki/HP_35s

    The HP 35s (F2215A) is a Hewlett-Packard non-graphing programmable scientific calculator. Although it is a successor to the HP 33s, it was introduced to commemorate the 35th anniversary of the HP-35, Hewlett-Packard's first pocket calculator (and the world's first pocket scientific calculator).