= staircase function

olemus
tükati konstantne funktsioon
= a piecewise constant function

näiteid
https://duckduckgo.com/?q=step+function&t=h_&iax=images&ia=images

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

https://en.wikipedia.org/wiki/Heaviside_step_function

https://mathbitsnotebook.com/Algebra1/FunctionGraphs/FNGTypePiecewise.html

https://users.math.msu.edu/users/gnagy/teaching/11-winter/mth235/lslides/l20-235.pdf