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Proposition: Connection between Quotient, Remainder, Modulo and Floor Function
Let \(a,b\) be given natural numbers with \(a > 0\). The uniquely defined quotient and remainder $q,r$ in the equation \[b=qa+r,\quad 0\le r < a\] are given by $q=\lfloor \frac ba\rfloor$ (floor function) and $r\equiv b\mod a$ (congruence class $b$ modulo $a$).
Table of Contents
Proofs: 1
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Definitions: 1
Proofs: 2 3
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References
Bibliography
 Graham L. Ronald, Knuth E. Donald, Patashnik Oren: "Concrete Mathematics", AddisonWesley, 1994, 2nd Edition