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  2. Triangle wave - Wikipedia

    en.wikipedia.org/wiki/Triangle_wave

    Animation of the additive synthesis of a triangle wave with an increasing number of harmonics. See Fourier Analysis for a mathematical description.. It is possible to approximate a triangle wave with additive synthesis by summing odd harmonics of the fundamental while multiplying every other odd harmonic by −1 (or, equivalently, changing its phase by π) and multiplying the amplitude of the ...

  3. Wave equation - Wikipedia

    en.wikipedia.org/wiki/Wave_equation

    By comparison with vector wave equations, the scalar wave equation can be seen as a special case of the vector wave equations; in the Cartesian coordinate system, the scalar wave equation is the equation to be satisfied by each component (for each coordinate axis, such as the x component for the x axis) of a vector wave without sources of waves ...

  4. Envelope (waves) - Wikipedia

    en.wikipedia.org/wiki/Envelope_(waves)

    A modulated wave resulting from adding two sine waves of identical amplitude and nearly identical wavelength and frequency. A common situation resulting in an envelope function in both space x and time t is the superposition of two waves of almost the same wavelength and frequency: [2]

  5. Dirichlet problem - Wikipedia

    en.wikipedia.org/wiki/Dirichlet_problem

    Consider the Dirichlet problem for the wave equation describing a string attached between walls with one end attached permanently and the other moving with the constant velocity i.e. the d'Alembert equation on the triangular region of the Cartesian product of the space and the time:

  6. Trump says Haley, Pompeo will not join second administration

    www.aol.com/news/trump-says-haley-pompeo-not...

    WASHINGTON (Reuters) -President-elect Donald Trump said on Saturday that former Republican presidential contender Nikki Haley and former Secretary of State Mike Pompeo will not be asked to join ...

  7. 4 million under winter storm alerts as snow buries Buffalo ...

    www.aol.com/news/york-counties-declare-state...

    More than 4 million people across five states were under winter storm alerts on Sunday as heavy lake-effect snow continued to bury the Great Lakes region, prompting emergency declarations and the ...

  8. Best CD rates today: Don't miss peak rates of 4.5% and ... - AOL

    www.aol.com/best-cd-rates-today-dont-miss-peak...

    Signs of cooling inflation paved the way for September’s first rate cut in four years, with economic data indicating a continued decline from a peak of 9.1% in June 2022 to rates that have ...

  9. List of equations in wave theory - Wikipedia

    en.wikipedia.org/wiki/List_of_equations_in_wave...

    m s −1 [L][T] −1 (Oscillatory) acceleration amplitude A, a 0, a m. Here a 0 is used. m s −2 [L][T] −2: Spatial position Position of a point in space, not necessarily a point on the wave profile or any line of propagation d, r: m [L] Wave profile displacement