Nyquist theorem and Anti-aliasing
Harry Nyquist, after whom the Nyquist Theory is named, was an electrical engineer at Harvard University. He made significant contributions to signal processing and information theory in the early 20th century.
Known as a pioneer in the field of sampling theory and information theory, Nyquist presented the concept of sampling frequency in his 1928 paper “Certain Topics in Telegraph Transmission Theory.” This concept later became known as the “Nyquist Theory.”