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References to 'floor'
1. $\displaystyle x\log^2x=O\left(\sum_{n \le x} 2^{\Omega(n)} \right)$ by Wkbj79
2. $\displaystyle \sum_{n \le x} (\tau(n))^a=O_a(x(\log x)^{2^a-1})$ for $a \ge 0$ by Wkbj79
3. $\displaystyle \sum_{n \le x} y^{\omega(n)}=O_y(x(\log x)^{y-1})$ for $y \ge 0$ by Wkbj79
4. a few complex multiplication tables by PrimeFan
5. Beatty sequence by Kevin OBryant
6. Beatty's theorem by drini
7. Bertrand's conjecture, proof of by CWoo
8. ceiling by yark
9. cyclic permutation by CWoo
10. de Polignac's formula by PrimeFan
11. decimal expansion by pahio
12. examples of characteristic functions by Wkbj79
13. existence and uniqueness of decimal expansion by stevecheng
14. formula for sequences satisfying second order recurrence relations by Wkbj79
15. fractional differentiation by Wkbj79
16. Fraenkel's partition theorem by Kevin OBryant
17. integer part by Wkbj79
18. mantissa function by pahio
19. proof of functional monotone class theorem by gel
20. proof of integral test by paolini
21. random Fibonacci sequence by PrimeFan
22. regarding the sets $A_n$ from the traveling hump sequence by Wkbj79
23. rounding by CWoo
24. stream interlace and deinterlace by michal
25. traveling hump sequence by Wkbj79