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Table 4 Numerical results of \(\pmb{a_{i}=L_{i}}\) , \(\pmb{r=2}\)

From: The upper bound estimation on the spectral norm of r-circulant matrices with the Fibonacci and Lucas numbers

n

Theorem  2.12

Theorem  1.6

\(\frac{\mathbf{Third\ column}}{\mathbf{Second\ column}}\)

1

2

2

\(\frac{2}{2}=1\)

2

5

4

\(\frac{4}{5}=\frac{4}{5}\)

3

\(3\sqrt{14}\)

\(2\sqrt{231}\)

\(\frac{2\sqrt{231}}{3\sqrt {14}}\approx2.708\)

4

\(\sqrt{390}\)

54

\(\frac{54}{\sqrt{390}}\approx2.734\)

5

\(\sqrt{1{,}343}\)

152

\(\frac{152}{\sqrt{1{,}343}}\approx4.418\)

6

\(10\sqrt{42}\)

394

\(\frac{394}{10\sqrt{342}}\approx6.080\)