I would like to make a graph in tikz as in enter image description here

However I would like to have an implies symbol instead of an arrow. How can I make a figure such as above but with implies (as well as not implies signs) as edges?

  • By implies do you mean a \Rightarrow ? (ie one with a double horizontal bar? – Thruston Jun 12 '14 at 13:57
  • 4
    Did you try \tikz \graph[edges=double] { a -> { b, c} -> d };? Is that what you need? – Thruston Jun 12 '14 at 14:13
  • @Thruston: Thanks a lot,+1. (Wonder why I could not find this in the manual) and suppose one also needs a not implies sign i.e. the sign as above but with a slanted line segment that cuts through it, is it ok to overlay or is there a more direct and elegant way like the one you have suggested? Cheers – Abhimanyu Arora Jun 12 '14 at 14:31
  • I'd suggest that you create the graph you want with edges=double and use some form of edge label for the not sign. If you update the question with your effort, you might get some more detailed suggestions or answers. – Thruston Jun 12 '14 at 21:21
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    You can use a decoration to put the slash midway. – user11232 Jun 12 '14 at 23:56

you can use double and implies (Note: the credit goes to @percusse for not implie command (i.e. degil).


            mark= at position 0.5 with {
                  \node[transform shape] (tempnode) {$\backslash$};

 \graph  {
  a ->[double] {b,c} ->[double,degil] d

enter image description here


Perhaps this...

  implies/.style={edges={double, double equal sign distance, -implies}},
  not implies/.style={implies,
    edge node={ node [sloped, xscale=-1] {$\backslash$} }
  !/.style={not implies}
\tikz\graph [implies] {
  a -> {b, c} ->[!] d;

enter image description here

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