User talk:Papaya25

Proper TeX usage
In this edit, you wrote, dozens of times, things like \left(x+1)\right and \left(u\right) where (x+1) and (u) would suffice. \left( and \right) are needed for thing s like
 * $$ \left(\frac 1 x + 1 \right)$$

in order to prevent them from appearing as
 * $$ (\frac 1 x + 1) $$

with the delimiters too small. Adding \left( and \right) when they have no effect causes people who are learning how to code things like this to think that \left( and \right) are always needed.

You also wrote things like
 * $$ \int f(x) \operatorname{d}x $$

coded as \int f(x) \operatorname{d}x. A commonplace error is to use \operatorname{} where \mathrm{} should be, but in this case you should have written
 * \int f(x) \, \mathrm{d}x

resulting in this:
 * $$ \int f(x) \, \mathrm{d}x $$

Here you can see the difference. But one should not think it is just that \operatorname{} results in horizontal spacing; rather with \operatorname{} the spacing depends on the context, so that, for example, the space to the right of $ \operatorname{csc}$ in $ \csc(x) $  is smaller than that in $ \operatorname{csc}x$, the latter being coded as \operatorname{csc}x and the former as \operatorname{csc}(x).

Michael Hardy (talk) 19:59, 24 September 2021 (UTC)