olemus
osaliselt järjestatud hulga element M,
mille korral M < y ei kehti ühegi teise elemendiga y
(märk "<" tähistab siin järjestust); maksimume võib olla mitu

Wiktionary:
2. (mathematics) the greatest value of a set or other mathematical structure, especially the global maximum or a local maximum of a function
3. (mathematical analysis) an upper bound of a set which is also an element of that set
4. (statistics) the largest value of a batch or sample or the upper bound of a probability distribution

ülevaateid
https://en.wikipedia.org/wiki/Maxima_and_minima

https://mathworld.wolfram.com/Maximum.html

https://encyclopediaofmath.org/wiki/Maximum_and_minimum_points