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Correction to equations (1) and (2)

Posted by mnelson846 on 18 Oct 2021 at 10:46 GMT

Please note that equations (1) and (2) contain a typographical error, inadvertently introduced during the journal's typesetting process. The diffusion terms should of course read \nabla^2, rather than \Delta^2, i.e. representing standard Laplacian terms.

Martin R. Nelson
(Corresponding author)

No competing interests declared.