ABSTRACT
The ceiling function of x, denoted https://www.w3.org/1998/Math/MathML"> x $ \left\lceil x \right\rceil $ https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315154978/d4fadf3f-0d14-435f-8ef5-075606867872/content/inline-math6_1.tif" xmlns:xlink="https://www.w3.org/1999/xlink"/> , is the least integer that is not smaller than x.
