# Translations:Dictionary:Z-transform/3/en

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The *z*-transform may be thought of as , where this allows one to relate it to the Fourier transform. The *z*-transform technique is an easy way of converting from the time domain into a form which can be treated as in the frequency domain. Convolution can be accomplished by merely multiplying the *z*-transforms of the waveforms being convolved, and the inverse of a filter can be found by finding the reciprocal of the filter's *z*-transform. The *z*-transform polynomial can be factored and expressed as the product of doublets of the form: