Niel de Beaudrap

4,905 reputation

930

bio	website
	location	Cambridge, United Kingdom
	age
visits	member for	2 years, 9 months
	seen	35 mins ago
stats	profile views	192

Researcher in quantum information --- involving algebras over finite dimensional Hilbert spaces, graphs and combinatorics, and vector spaces over ℤ/pℤ.

I habitually edit and re-edit anything I write, as long as I have the time, interest, and ability. I should probably apologize for this tendency, but you will probably have to be satisfied with being warned about it instead.

	4,905 reputation	bio	website		visits	member for	2 years, 9 months
930 badges		location	Cambridge, United Kingdom		seen	35 mins ago

summary answers questions tags badges favorites bounties reputation activity

404 Actions

suggestions reviews revisions comments badges posts accepts all

Feb 4	comment	Writing the Existential Quantifier with Lower and Upper Limits @egreg: I think I'm starting to get the idea of when I should expect `\vcenter` tobe the secret behind vertical spacing of pieces of (La)TeX -- absent actually looking at the definitions, of course. Good point about the redundancy of `\mathop`, I think it persisted due to two different approaches I was taking to prototyping the macro.
Feb 4	answered	Writing the Existential Quantifier with Lower and Upper Limits
Jan 30	revised	How to construct a long equation that is split in LHS and RHS to occupy a narrow column? added link, fixed typo
Jan 30	comment	Aberrant vertical spacing with {align} and friends? So then `\jot` indeed is not random random --- I had thought previously that it was a fixed width --- you just mean that my usage of it was arbitrary. (It indeed was guesswork.)
Jan 30	answered	How to construct a long equation that is split in LHS and RHS to occupy a narrow column?
Jan 30	comment	Aberrant vertical spacing with {align} and friends? Marvellous. (I obviously don't understand what `\jot` is meant to be doing; just mathglue?) Thanks!
Jan 30	comment	Aberrant vertical spacing with {align} and friends? Consider `\savebox0{$\displaystyle \left( \sum_{\substack{a \\ b}} \right)$} text \strut\\[\dimexpr-\ht0-\lineskip-\jot]\strut \phantom{text} $\begin{aligned}[t] \left( \sum_{\substack{a \\ b}} \right)\end{aligned}$`. This is not quite vertically aligned, and how well it is aligned will depend on the point-size. What would you recommend in this case?
Jan 30	comment	Aberrant vertical spacing with {align} and friends? I don't think you're understanding me. Consider the answer by mafp, on the other topic. I am trying to find a way that one may modify his code to make the baseline of the top line of the first inner `aligned` environment be properly aligned with the baseline of the enumeration item. My proposed strategy is to use the right amount of negative space, which raises the question of what that is and how one can go about systematically producing the correct spacing. I was remarking on this in response to your question as to why I want to use a newline, at the end of your answer.
Jan 30	comment	Aberrant vertical spacing with {align} and friends? I remark on precisely that on mafp's answer, in response to the OP for that question. The reason for that is perfectly clear; but this explains why I want to use a new line.
Jan 30	accepted	Aberrant vertical spacing with {align} and friends?
Jan 30	revised	Aberrant vertical spacing with {align} and friends? minor revisions to allow me to un-downvote
Jan 30	comment	Aberrant vertical spacing with {align} and friends? The reason why I am starting a new line is related to the linked topic in my original question. I want an `aligned` environment to line properly with an enumeration item in context like `\item $\begin{aligned}[t] \begin{aligned}[b] a &+ b \\ &+ c \end{aligned} &= \begin{aligned}[t] d &+ e \\ &+ f \end{aligned}\end{aligned}$`. The first inner `aligned` environment is too tall: to achieve proper alignment, starting a new line and pulling the environment back up to level seemed most appropriate.
Jan 30	comment	Aberrant vertical spacing with {align} and friends? What role precisely is the strut performing in defining the space to undo, presumably with `\lineskip`?
Jan 30	comment	Aberrant vertical spacing with {align} and friends? This doesn't seem to explain the fact that I have good alignment in the second and third test cases, though.
Jan 29	asked	Aberrant vertical spacing with {align} and friends?
Jan 29	comment	How to construct a long equation that is split in LHS and RHS to occupy a narrow column? @GarbageCollector: in fact, it is working perfectly: the baseline of the first line of the `aligned` environment is the same as the enumeration label. The problem is that within the first line is another `aligned` environment which has multiple lines, and which aligns its baseline on the final line -- causing its first line to sit above the baseline of the enumeration label. I've been puzzling over "the right way" to fix that problem myself. It's easy enough to fudge with something like `~\\[-2.25ex]` before the math, but that's not a robust way to do things.
Jan 29	comment	How to construct a long equation that is split in LHS and RHS to occupy a narrow column? Do you mean that the document should have left and right columns, and that once the text / equations have gotten to the bottom of the left column, it should start again on the right? Or is the right column meant to remain blank?
Jan 29	comment	How to limit the width of equations? Could you elaborate on what prevents you from using `align`? It really is a better tool for the job. I would sooner forego numbering entirely using `\[ maths \]`, or try to figure out how to do the equation numbering by hand, than use the equation spacing we see in your two examples.
Dec 22	comment	How should imaginary numbers be typeset? @AndrewStacey: not sure if serious, or tongue in cheek. In any case, the correct thing to do is what is easiest to read. As I gain no benefit in having upright 'i' characters in my math, and it disrupts the italics — and because (due to laziness of previous authors or deliberate choice) the imaginary unit looks like it should be italic just as the ring of integers should be blackboard-bold, I deliberately leave it italicised.
Dec 22	comment	All the document in only one long and continuous page Just please, whatever you do, don't use `multicol` when you do this.