[Xy-pic] Thicker arrows

[Vadim Yu. Radionov]

Dear Ross!

On Sat, 12 Jul 2003, Ross Moore wrote:

> Please read the manual, before making comments on a public list
> about what software programs can or cannot do.

I apologise for my hasty and incorrect statements.

I only want to note that scaled arrow heads are not the desired
result, in my case.  Probably i should dive in the manual more deeply, but
the proposed modifiers seem to increase the arrow heads length together
with thickness.  So i had to turn to Metapost instead, redefining the
macro for arrow heads to give similar shape to that of Xypic arrows but
with the thickness and the size varying independently.

Sincerely yours,

Vadim