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  2. Root mean square - Wikipedia

    en.wikipedia.org/wiki/Root_mean_square

    The RMS value of a set of values (or a continuous-time waveform) is the square root of the arithmetic mean of the squares of the values, or the square of the function that defines the continuous waveform. In physics, the RMS current value can also be defined as the "value of the direct current that dissipates the same power in a resistor."

  3. Absolute value - Wikipedia

    en.wikipedia.org/wiki/Absolute_value

    In mathematics, the absolute value or modulus of a real number , denoted , is the non-negative value of without regard to its sign. Namely, if is a positive number, and if is negative (in which case negating makes positive), and . For example, the absolute value of 3 is 3, and the absolute value of −3 is also 3.

  4. Interval (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Interval_(mathematics)

    A degenerate interval is any set consisting of a single real number (i.e., an interval of the form [a, a]). [6] Some authors include the empty set in this definition. A real interval that is neither empty nor degenerate is said to be proper, and has infinitely many elements.

  5. Planck's law - Wikipedia

    en.wikipedia.org/wiki/Planck's_law

    The second column of the following table lists the corresponding values of λT, that is, those values of x for which the wavelength λ is ⁠ x / T ⁠ micrometers at the radiance percentile point given by the corresponding entry in the first column. That is, 0.01% of the radiation is at a wavelength below ⁠ 910 / T ⁠ μm, 20% below ...

  6. Schrödinger equation - Wikipedia

    en.wikipedia.org/wiki/Schrödinger_equation

    Linearity. [edit] The Schrödinger equation is a linear differential equation, meaning that if two state vectors and are solutions, then so is any linear combination of the two state vectors where a and b are any complex numbers. [ 13 ]: 25 Moreover, the sum can be extended for any number of state vectors.

  7. Convex function - Wikipedia

    en.wikipedia.org/wiki/Convex_function

    In mathematics, a real-valued function is called convex if the line segment between any two distinct points on the graph of the function lies above or on the graph between the two points. Equivalently, a function is convex if its epigraph (the set of points on or above the graph of the function) is a convex set.

  8. Integral - Wikipedia

    en.wikipedia.org/wiki/Integral

    t. e. In mathematics, an integralis the continuous analog of a sum, which is used to calculate areas, volumes, and their generalizations. Integration, the process of computing an integral, is one of the two fundamental operations of calculus,[a]the other being differentiation.

  9. Quantum potential - Wikipedia

    en.wikipedia.org/wiki/Quantum_potential

    In the framework of the de Broglie–Bohm theory, the quantum potential is a term within the Schrödinger equation which acts to guide the movement of quantum particles. . The quantum potential approach introduced by Bohm [1] [2] provides a physically less fundamental exposition of the idea presented by Louis de Broglie: de Broglie had postulated in 1925 that the relativistic wave function ...