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In the definition: Should ${\displaystyle \Delta _{\infty }u(x)}$ read ${\displaystyle \langle \Delta _{\infty }u,u\rangle }$ or something? Having x-dependence on the left but not the right seems strange. — Preceding unsigned comment added by 87.234.240.61 ( talk) 12:49, 5 August 2013 (UTC) reply

Your suggestion would not help: in the article, ${\displaystyle \langle \dots \rangle }$ stands for Euclidean inner product (the gradients to which it is applied on the right are vectors), not for ${\displaystyle \int f(x)g(x)dx}$. Anyway, the right side also depends on x, one could write ${\displaystyle u(x)}$ everywhere, but it would make reading a bit harder. Maybe it should indeed be changed. GaborPete ( talk) 21:29, 27 December 2016 (UTC) reply

I have fixed this issue now, I hope. GaborPete ( talk) 23:38, 2 April 2024 (UTC) reply