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. 2023 Feb 15;15(4):958. doi: 10.3390/polym15040958

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© 2023 by the author.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).

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Relaxation spectrum $H (v)$ (57) (solid red line) from Example 1 and the approximated models ${\bar{H}}_{K} (v)$ (23): (a) Legendre, (b) Laguerre, (c) Chebyshev, (d) Hermite.

Relaxation spectrum $H (v)$ (57) (solid red line) from Example 1 and the approximated models ${\bar{H}}_{K} (v)$ (23): (a) Legendre, (b) Laguerre, (c) Chebyshev, (d) Hermite.