I welcome constructive commenting. You are required to provide your email address and a displayed name but you don’t have to register. Your email address will not be publicly shown, only I can see it.

You can use Markdown or HTML formatting. You can also use LaTeX this way: $latex a^2 + b^2 = c^2$ produces a^2 + b^2 = c^2. The dollar sign must be followed by the word ‘latex’ and a space character.


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