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  2. Power inverter - Wikipedia

    en.wikipedia.org/wiki/Power_inverter

    A power inverter, inverter, or invertor is a power electronic device or circuitry that changes direct current (DC) to alternating current (AC). [1] The resulting AC frequency obtained depends on the particular device employed.

  3. Mathematics - Wikipedia

    en.wikipedia.org/wiki/Mathematics

    In this model, the individual seeks to maximize their self-interest, [153] and always makes optimal choices using perfect information. [154] This atomistic view of economics allows it to relatively easily mathematize its thinking, because individual calculations are transposed into mathematical calculations. Such mathematical modeling allows ...