@FaheemMitha Yeah, I wish I could be here more, but I've been having a really busy semester so far, which I think is part of it. I'm supposed to be writing a thesis, which I haven't really started. Been busy presenting research at conferences ...

@AdamLiter I see. Well, it's good to be (pleasantly) occupied.

On my notebook, connected to a tramway WiFi. Prague has entered the 21st century today :D

@yo' :) On our buses there's not even the voice telling the next stop.

@egreg this is a test thing, there's only couple WiFi tramways :) I'm only missing the electricity mains here :D

(unfortunately, IMAP and SMTP are forbidden, so I'm stuck with the web interface for mail. I gotta test SFTP)

SFTP works, good :D

Can somebody add a comment or tell me i am wrong? tex.stackexchange.com/a/277665/37907

@Johannes_B I'm 99% sure you are not wrong.

One should realy \LoadClass after \ProcessOptions

Idiots everywhere.

Explaining the same thing for three or four times either means lack of effort or i am really really a bad explainer.

spot the obvious mistake....

goo.gl/photos/gpKqJZGtzw3PQBSy5

@DavidCarlisle VW diesel?

@DavidCarlisle Who does that car belong to?

@FaheemMitha Probably someone in need of a new car!

@JosephWright I thought maybe it was someone David knows.

@StefanKottwitz Thanks. I believe I could have deleted this myself. But you answered the question if such posts should be deleted without notice, too.

Which command do I have to use to get the following symbol?

It's like \Leftrightarrow but there are 3 lines, \equiv instead of =.

@MaryStar Are you sure you want this ugly symbol?

@MaryStar There is \Lleftarrow and \Rrightarrow in amssymb so something like \newcommand\Iff{\Lleftarrow\joinrel\!\Rrightarrow} could work

I want to write that something is identically equivalent to something else. What symbol should I use? @yo'

Hello everybody! I just read this answer and noticed that apparently luatex does hyphenate the first word of a paragraph which is not compatible with Knuth-TeX behaviour. Am I just getting this wrong or did I detect another incompatibility of luatex?

@HenriMenke STATUS BYDESIGN

@HenriMenke The behaviour of classical TeX is a 'feature' but I don't think one can say it's something you'd deliberately do if starting a new approach today. As such, the LuaTeX people decided that they would alter this: it's documented in the manual and really there's nothing wrong with this change.

@HenriMenke LuaTeX is quite explicitly not back-compatible with TeX90 in terms of saying 'the output won't change'. That's all by-design and whilst some of the decisions we might argue about others are entirely sensible.

@JosephWright This bothers me a little, because I don't see the point why one should break backwards compatibility. I like xetex's approach in that regard, as they seem to deliver perfectly compatible output if no additional primitives are used. I would love to see this decision in luatex as well.

@HenriMenke They've got their reasons, and here they are entirely sound. The lack of hyphenation of the first word in a paragraph is clearly a bug in TeX in any realistic sense. Keeping it (forever) for 'stability' is not realistic.

@HenriMenke I'm quite happy if new engines don't try to keep everything. It is (at least for languages with longer words) simply a pain that tex doesn't hyphenate the first word. In all tabulars one has to insert \hspaces.

@HenriMenke As the LuaTeX team say, if you want a frozen engine stick to pdfTeX: even XeTeX is being updated and there are cases it won't do the same as TeX90 (as it's Unicode)

@HenriMenke The LuaTeX manual on hyphenation is quite informative: the business about hyphenation in TeX90 being a property of the font is another 'feature' that I don't feel one can argue for. There are things I'm not so sure about in LuaTeX but 'we are free to make changes' is not one of them.

@UlrikeFischer Indeed

@FaheemMitha me:-)

@DavidCarlisle oh no! What happened?

@PauloCereda the tree in the garden decided to lie down during the night. No one hurt and car amazingly only has a minor dent.

@DavidCarlisle oh my!

Aw :(

Hi guys, small question about tikz-cd: Is there any way to extend arrows?

I'd like to label a horizontal arrow by orbit map, proper, but it doesn't quite fit. I managed to use column sep = huge to make it just fit, but I'd like something more spacious.

Hi there! Can anyobody recommend a PDF linter tool / syntax checker (offline / command line application)?

@Danu [column sep=5cm]?

@DavidCarlisle -- reminds me of the time when, at a former location of the ams, and parking was up a hill across the street, i looked out the window one afternoon and saw a (much bigger) tree lying across my car. the branches of the tree were wide enough (and strong enough) that the car was hardly touched; only a small scratch on the roof. i ducked under the tree, got in, and drove out. whew!

@TorbjørnT. Heh

I feel stupid

@barbarabeeton I was contemplating trying to back out this morning but there was just a bit too much pressure on the roof I was afraid the branch would come down on to the windscreen or engine, having the metal props added, gave a bit more security. the tree as it was in '97 when we bought the house (been pollarded twice since then) dcarlisle.demon.co.uk/willow/pic2.jpg

@clemens For spam or advertising which is unrelated to LaTeX, a notice is a waste of time. Clear spam: I remove the spammer account with posts. Offtopic ads which are not clearly bad: removing post but keeping the account to the user could still say sth. Ads related to LaTeX: why not. Border cases: just off topic advertising links removed, maybe a notice with question. Sometimes there's a friendly off topic post but with advertising signature: so I disable the signature and maybe check later.

@DavidCarlisle Oh, sorry to hear that.

@DavidCarlisle Wow, that's fortunate.

@FaheemMitha no one was hurt, could have been a lot worse!

@DavidCarlisle What will happen to your address now? It won't be the willow house anymore. :)

@DavidCarlisle Indeed it could have.

Did the tree completely collapse? What happened exactly?

@FaheemMitha one main branch split down it's full length, in the picture below you see the whole horizontal part above my car split off the bright orange wood going vertically up the tree. Willow's are prone to spltting:-) goo.gl/photos/KaxWNk8irfipTFUR6

@DavidCarlisle So the main tree is still standing?

@FaheemMitha yep

@DavidCarlisle ooh then scratch my question about willow house no more. :)

there is a preservation order on the tree so normally to cut so much as a twig off it requires permission of the council and 6 week notice in a local paper. Decided to omit some of the formalities this morning:-)

@DavidCarlisle Is it a special willow tree?

@DavidCarlisle wood for the fireplace? :)

@FaheemMitha not particularly, but villages tend to enact special powers to preserve green spaces, trees etc, to prevent loss of character and urban development

@DavidCarlisle I see.

@PauloCereda possibly, but willow is rubbish as firewood, spits like anything,

So, it's a general preservation order, then.

@DavidCarlisle ouch. I am not versed in fireplaces. :)

@FaheemMitha yes but specific to that tree (we had more paperwork for the tree than we did for the house when we bought the property:-)

@DavidCarlisle Wow. I guess the British take nature preservation seriously.

@MaryStar Isn't simply <=> what you are looking for? I fail to see a case where logical equivalence is anything else than this.

@DavidCarlisle do not cut that willow down until I visit you. I need that tree as a reference. :)

@PauloCereda A reference to what?

@FaheemMitha to me.

Stupid question: How was it that one tests for the new type of kernel such that a package only provides things on older kernels.

Will mentioned that \DeclareMathSizes is now fixed in the kernel (such that its arguments can handle units), thus I'd like to remove that macro from mathtools (when running on newer kernels)

@daleif you can use \@ifl@ter but simpler is just to test for a command being defined so \ifx\e@alloc\@undefined 2014 \else 2015\fi

@DavidCarlisle ok, noted

@barbarabeeton can't you edit wikibooks even without registering? i just hit the edit button and appeared to be able to edit, although I didn't save?

@DavidCarlisle -- when i tried to edit the latex wikibook, i think i ran into a wall when i tried to save. i don't remember the details; it was rather a long time ago. what i do remember was that, after making numerous edits, and validating it offline (in a local wiki environment), nothing that i tried succeeded in getting my effort into the review queue. very sad, because that wikibook really does need help.

I'm sorry, but I lol'd: blog.stackoverflow.com/2015/11/…

Hihi, i got a downvote today: tex.stackexchange.com/questions/223764/…

@Johannes_B I usually blame @Paulo vim users.

@DavidCarlisle Now my rep number is annoyingly uneven.

@Johannes_B if you downvote egreg you can change your rep parity...

@DavidCarlisle Right, i loose rep when downvoting. But that would be unfair. egreg has worked so hard for those digits :-)

I using p_1^-1 and expecting that to be p index 1 inverse (to power -1) but it's doing the subscript then just putting the -1 after it

any tips on that?

@baxx $p_1^{-1}$ However, it is quite a basic thing; have you read some good LaTeX tutorial?

ah ace - thanks @y

@baxx why were you expecting that?:-) Consider p^-1+x-2 tex has no way of knowing what is the superscript unless you mark it up.

yeah I've probably read that before and forgot it

dunno thought that the super script worked with the subscript like that for some reason, not sure where I got the idea from, not a great one

@PauloCereda you only got 4 so you lost: souldern.org/home/announcements/winner (apart from being disqualified on age and place of residence criteria)

@DavidCarlisle You're playing with pheasants, while people work at answering questions.

@egreg playing with trees mostly today :(

@DavidCarlisle Beware, trees are dangerous if they fall down.

@egreg your advice about as useful as ever, I see.

@DavidCarlisle You're welcome!

@egreg i should know better than to trust an OP to give an accurate error description. OK I'll vote dup:-)

@DavidCarlisle Possibly the reported error was the final one after a long series of frames after the faulty one. Difficult to test.

@egreg we should blame @JosephWright that beamer fragile frames are so fragile.

@DavidCarlisle Yes, and also people indenting their code.

@egreg wow so seems like there is a third dup (if that is possible) with a more sensible title and an excellent accepted answer tex.stackexchange.com/questions/234778/…

@DavidCarlisle Bad hack. :P