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Table 2 Maximum value of REFs and the associated \(\textrm{Co}_{\mathcal {J}}^{\ell }\) for \(\ell =5,6,7,8\) obtained by using the QLM-SCPSK approach with \(N=10\) and various \(\mathcal {J}\) on [0, 100]

From: Stability analysis and numerical evaluations of a COVID-19 model with vaccination

\(\mathcal {J}\)

\(L^{\infty }_5\)

\(\textrm{Co}_{\mathcal {J}}^5\)

\(L^{\infty }_6\)

\(\textrm{Co}_{\mathcal {J}}^6\)

\(L^{\infty }_7\)

\(\textrm{Co}_{\mathcal {J}}^7\)

\(L^{\infty }_8\)

\(\textrm{Co}_{\mathcal {J}}^8\)

2

\(1.7318_{+01}\)

−

\(1.1180_{+06}\)

−

\(1.4769_{+01}\)

−

\(1.1180_{+06}\)

−

4

\(1.6228_{+01}\)

0.0938

\(3.9021_{+05}\)

1.5186

\(1.5071_{-03}\)

13.2585

\(3.9021_{+05}\)

1.5186

8

\(1.7063_{-01}\)

6.5715

\(2.3252_{+03}\)

7.3907

\(4.3107_{-12}\)

28.3812

\(2.3252_{+03}\)

7.3907

16

\(1.6259_{-03}\)

6.7135

\(2.6979_{-01}\)

13.073

\(5.9301_{-19}\)

22.7934

\(2.6979_{-01}\)

13.073

32

\(2.4221_{-11}\)

26.000

\(4.3585_{-11}\)

32.527

\(4.8004_{-34}\)

50.1338

\(4.3585_{-11}\)

32.527