## The Forum for Discussion about The Third Manifesto and Related Matters

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# Latex test

$latex -6 + 11 x - 6 x^2 + x^3 = 0$

Is forum wordpress based? Then I'm puzzled why latex is not working.

Quote from Tegiri Nenashi on June 25, 2019, 5:03 pm

$latex -6 + 11 x - 6 x^2 + x^3 = 0$

Is forum wordpress based? Then I'm puzzled why latex is not working.

It requires a LaTeX plugin, which at the moment it doesn't have. I shall look into this.

For testing...

$3 \times 4$

Nope, this isn't going to be as easy as I thought. It's easy to get LaTeX onto standard Wordpress posts, but these forum postings aren't standard Wordpress posts.

I'll look into this again as time permits, but for now no LaTeX.

Quote from Dave Voorhis on June 25, 2019, 5:37 pm

Nope, this isn't going to be as easy as I thought. It's easy to get LaTeX onto standard Wordpress posts, but these forum postings aren't standard Wordpress posts.

I'll look into this again as time permits, but for now no LaTeX.

Fortunately lots of people can read TeX directly if the equations aren't too hairy.  I'm no mathematician and I have no problem with it.  Eqn is even better on this score: it was designed for typists who knew no mathematics at all but could read mathematical expressions out loud: you literally write things like "#y sub 1 = x sup 2^+^1#"

Testing LaTeX support...

$F(x) = \int^a_b \frac{1}{3}x^3$

LaTeX support is now working. Due to issues with escaping dropping characters, I've included the instructions as an attached image.

Any good introductory latex reference anywhere ?

Quote from Erwin on June 27, 2019, 6:48 am

Any good introductory latex reference anywhere ?

I suggest starting with https://www.overleaf.com/learn/latex/Mathematical_expressions and work outward.

Overleaf.com is an online LaTeX editor -- which is an epic bit of goodness in its own right -- but also a good start to learning LaTeX as you can see the source code in action, so to speak.

Quote from Erwin on July 2, 2019, 8:17 pm

As for the latex thing : who on earth calls "intersect" "cap" and "fi" "oslash" ???

(Seems more appropriate to answer Erwin's q here.)

I call "intersect" "cap" (because it's upside-down "cup"; $\Cup$ "\Cup" is the most suggestive I can find for Tropashko's Inner Union; oh and $\Cap$ for Inner Intersection) -- much less typing. In general in Latex, most symbols have multiple names, partly reflecting that different branches of math use the same symbol for different purposes. (Also there's different 'packages' with different names. I see bowtie gets called Join in some places -- that's going to annoy the latticesticians.)

"oslash" I tend to call "null" (which seems not to exist) or "empty[set]". Do you mean "Phi" or "phi"?

$\null \empty \emptyset \fi \Phi \phi \oslash$

Quote from AntC on July 3, 2019, 11:51 am

"oslash" I tend to call "null" (which seems not to exist) or "empty[set]". Do you mean "Phi" or "phi"?

$\null \empty \emptyset \fi \Phi \phi \oslash$

Essentially all LaTeX characters are also available as plain Unicode, from which we can see that capital O with slash (as used in Danish and Norwegian) is Ø, whereas the null-set symbol is ∅.