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References to 'ceiling'
1. Beatty sequence by Kevin OBryant
2. consequence operator by rspuzio
3. examples of characteristic functions by Wkbj79
4. floor by yark
5. growth of exponential function by pahio
6. integer part by Wkbj79
7. one-sided continuity by pahio
8. rounding by CWoo
9. systematic sampling by CWoo
10. table of differences between $\lceil \sqrt{n!} \rceil^2$ and $n!$ for $0 < n < 26$ by PrimeFan