In mathematics, O(n) may refer to:

• O(n), the orthogonal group
• Big O notation, indicating the order of growth of some quantity as a function of "n" or the limiting behavior of a function, e.g. in computational complexity theory
• The nth tensor power of Serre's twisting sheaf ${\displaystyle {\mathcal {O}}(1)}$

Topics referred to by the same term

This disambiguation page lists mathematics articles associated with the same title.
If an internal link led you here, you may wish to change the link to point directly to the intended article.