Mdtryhht

I need an arrow like the following:

I tried

newcommandwedgearrowmathrel/joinrelssearrow %stmaryrd

but it doesn't work well.

Similar to Ahrtaler's answer, the difference being that it also cooperates with subscripts and becomes bold if one is in bold mode. I recommend this thread for further reading.

documentclassarticle
usepackagetikz
usepackageamsmath
makeatletter
DeclareRobustCommandcheckbold[1]% https://tex.stackexchange.com/a/24635/121799
 edef@tempamath@versionedef@tempbbold%
 ifx@tempa@tempb%
 def#11%
 else
 def#10%
 fi
makeatother 
newcommandwedgearrowcheckboldtmp%
ensuremathmathrel%
mathchoice%
tikz[baseline=-0.1ex]draw[line width=(1+0.33*tmp)*0.06em,->](0,0) -- (60:0.6em) -- ++ (-60:0.6em);
%
tikz[baseline=-0.1ex]draw[line width=(1+0.33*tmp)*0.06em,->](0,0) -- (60:0.6em) -- ++ (-60:0.6em);
%
tikz[baseline=-0.075ex]draw[line width=(1+0.33*tmp)*0.045em,->](0,0) -- (60:0.45em) -- ++(-60:0.45em);
%
tikz[baseline=-0.06ex]draw[line width=(1+0.33*tmp)*0.035em,->](0,0) -- (60:0.35em) -- ++ (-60:0.35em);

begindocument
$Awedgearrow B_Cwedgearrow D$ Large $Awedgearrow B_Cwedgearrow D$

boldmath$Awedgearrow B_Cwedgearrow D$ Large $Awedgearrow B_Cwedgearrow D$
unboldmath
enddocument

EDITs:

1. added mathrel at Eclipse Sun's suggestion.


2. Made the macro detect the font weight, too, so the arrow goes bold in boldmath or boldsymbol, just like the standard arrows.

I think you could do something like that:

documentclassscrartcl

usepackagetikz

newlengthtextsize

makeatletter
setlengthtextsizef@size pt
makeatother

newcommandwedgearrow%
 resizebox ! textsize 
 begintikzpicture
 draw[->, line width = 2pt] (0,0) -- (.5,1) -- (1,0);
 endtikzpicture


begindocument
 Hi this wedgearrow is a wedgearrow
enddocument

No tikz...works across math styles.

documentclassarticle
usepackagescalerel,stmaryrd
newsaveboxwedgearrowbaseline
saveboxwedgearrowbaseline$scalerel%
 ooalignkern.05pt/cr/mkern-8.5mussearrow$
newcommandwedgearrowmathrelscalerel*%
 useboxwedgearrowbaselineX %stmaryrd
begindocument
$Kwedgearrow L$

$scriptstyle Kwedgearrow L$

$scriptscriptstyle Kwedgearrow L$
enddocument