Not signed in (Sign In)

Not signed in

Want to take part in these discussions? Sign in if you have an account, or apply for one below

  • Sign in using OpenID

Site Tag Cloud

2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry book bundles calculus categorical categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics complex complex-geometry computable-mathematics computer-science constructive cosmology deformation-theory descent diagrams differential differential-cohomology differential-equations differential-geometry digraphs duality elliptic-cohomology enriched fibration finite foundation foundations functional-analysis functor gauge-theory gebra geometric-quantization geometry graph graphs gravity grothendieck group group-theory harmonic-analysis higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory homological homological-algebra homotopy homotopy-theory homotopy-type-theory index-theory integration integration-theory k-theory lie-theory limits linear linear-algebra locale localization logic mathematics measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology nlab noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pages pasting philosophy physics pro-object probability probability-theory quantization quantum quantum-field quantum-field-theory quantum-mechanics quantum-physics quantum-theory question representation representation-theory riemannian-geometry scheme schemes set set-theory sheaf sheaves simplicial space spin-geometry stable-homotopy-theory stack string string-theory superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory tqft type type-theory universal variational-calculus

Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.

Welcome to nForum
If you want to take part in these discussions either sign in now (if you have an account), apply for one now (if you don't).
    • CommentRowNumber1.
    • CommentAuthorUrs
    • CommentTimeFeb 24th 2012
    • (edited Feb 24th 2012)

    What’s the way, if any, to typeset a diagonal arrow that points in both direction?

    (like \swarrow and \nearrow, but having arrowheads on both sides)

    • CommentRowNumber2.
    • CommentAuthorMike Shulman
    • CommentTimeFeb 24th 2012

    Well, that isn’t in any of the standard packages on my latex symbols list, detexify can’t handle it, and I can’t even find it on a unicode arrows list. So my guess is, there isn’t one, short of escaping to a drawing package like xy, tikz, or svg.

    • CommentRowNumber3.
    • CommentAuthorUrs
    • CommentTimeFeb 24th 2012

    Okay, thanks. I should have checked that unicode list myself. I was beiong lazy…

    • CommentRowNumber4.
    • CommentAuthorAndrew Stacey
    • CommentTimeFeb 24th 2012

    I’ve been building up a family of extra SVG arrows for use in situations like this. They’re easy enough to generate using TikZ and can be used as [[!include SVG leftrightarrow]] for example. It’s not quite as convenient as \leftrightarrow but does make it easy to extend the current set of arrows. I don’t think that the one you want is currently in my list, but it’s easy enough to add. The only catch is that they aren’t extendible, so what length should it be? Is it for inline, or for a commutative diagram?

    This is how I did the arrows in Tom’s article, by the way.

    • CommentRowNumber5.
    • CommentAuthorUrs
    • CommentTimeFeb 24th 2012
    • (edited Feb 24th 2012)

    Hi Andrew,

    currently I’d need such a diagonal arrow in the big table at duality in string theory, the one labeled “U-duality”.

    Since that table is not pretty anyway – it wants to be a big nice hyperlinked SVG-diagram but is instead a hack using the available instiki functionality – it wouldn’t really matter much whether the diagonal arrow has precisely the optimal length.

    • CommentRowNumber6.
    • CommentAuthorAndrew Stacey
    • CommentTimeFeb 24th 2012

    Done. It doesn’t quite match the others, and I didn’t put it in maths mode so the spacing is a bit off, but as you say that table is crying out for a rewrite (you could always try the inbuilt SVG editor) so it’s as much to demonstrate the capability as anything else.

    • CommentRowNumber7.
    • CommentAuthorUrs
    • CommentTimeFeb 24th 2012

    Done.

    Thanks!

    you could always try the inbuilt SVG editor

    This editor doesn’t work on my machine, unfortunately.