I use xypics for diagrams, but I don't know how to put the dashed line in the diagram below. Search didn't find much. Can anybody here help?
Here's a way to do it without putting an extra column into the diagram. The dashed line is again inserted as a dashed arrow with no head or tail, i.e.,
Note the semicolon; that means that the source is the thing before it and the target is the thing after it. The source is thus
Similarly, the target of the arrow is
Here's a complete latex file:
I believe that the only possibility is to insert a new column from the first line to the last one, without entries.
You can control the space between columns changing the value
Probably it is not possible to change the space only for some columns.
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