A local maximum, also called a relative maximum, is a maximum within some neighborhood that need not be (but may be) a global maximum.
Local Maximum
See also
Global Maximum, Local Minimum, Maximum, Peano SurfaceExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Local Maximum." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/LocalMaximum.html