Consecutive Pairs of Quadratic Residues/Examples/3
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Examples of Consecutive Pairs of Quadratic Residues
There are no Consecutive Pairs of Quadratic Residues modulo $3$.
This is consistent with the number of such consecutive pairs being $\floor {\dfrac 3 4}$.
Proof
From Quadratic Residues modulo $3$:
- $1$ is a quadratic residue
- $2$ is not a quadratic residue.
Hence neither is an element of a pair of consecutive quadratic residues.
The result follows.
$\blacksquare$
Sources
- 1971: George E. Andrews: Number Theory ... (previous) ... (next): $\text {3-5}$ The Use of Computers in Number Theory: Exercise $7$