[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Binary Relations, draft 1

>>>>> "HA" == Hans Aberg <haberg@matematik.su.se> writes:

 >> We are left with the question whether the equilateral triangles are
 >> relations or operations, with a "probably not" as temporary answer.

 HA> No, I think that equilateral triangles can be binary operators, like the
 HA> TeX \triangleleft and \triangleright. These should then be small in size,
 HA> similar to that of \circ, \bullet and those.

Sorry, that was my intended meaning.

 HA> In addition to the outline binary operations, just as \circ has a filled-in
 HA> version \bullet, one might think of filled in versions of \triangleleft,
 HA> \triangleright, and \diamond.

These are all in the tables.

 HA> I have also found that both outline and filled similarly sized and
 HA> positioned small squares are excellent to use as binary operations.

And these too.

 >> Building on that, we would like to have a variation on the triangles as
 >> binary relations, and these probably should look like closed succ and
 >> prec. (with the advantage that these can never be confused with the
 >> equilateral triangle operators). Am I correct?

 HA> Yes, that is my suggestion.

Ok, will be done.

[...the other problems are more or less solved now...]