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- Nambu–Goldstone boson (a.k.a. Goldstone boson) – Yoichiro Nambu and Jeffrey Goldstone
- Nash equilibrium – John Forbes Nash
- Nassi–Shneiderman diagram – Isaac Nassi and Ben Shneiderman
- Necker cube – Louis Albert Necker
- Needleman–Wunsch algorithm – Saul B. Needleman and Christian D. Wunsch
- Néel temperature – Louis Néel
- Nernst equation – Walther Hermann Nernst
- Nernst-Ettingshausen effect – Walther Hermann Nernst and Albert von Ettingshausen
- Newcomb's paradox – William Newcomb
- Newton's rings, Newtonian constant, mechanics – Isaac Newton
- Nichols–Tolman effect – Nichols and Richard Chace Tolman
- Nordmann–Tikhoff effect – Charles Nordmann and Gavriil Adrianovich Tikhov
- Nordtvedt effect – Kenneth L. Nordtvedt
- Nurgaliev's law – Ildus S. Nurgaliev
- Nyquist frequency, Nyquist rate – Harry Nyquist
- Nyquist–Shannon sampling theorem (a.k.a. Nyquist–Shannon–Kotelnikov, Whittaker–Shannon–Kotelnikov, Whittaker–Nyquist–Kotelnikov–Shannon, WKS theorem) – Harry Nyquist, Claude Shannon, E. T. Whittaker, and Vladimir Kotelnikov
Read more about this topic: Scientific Phenomena Named After People