From: William F Hammond <hammond@csc.albany.edu>

Date: Thu, 20 May 2010 11:08:43 -0400

To: W3C MathML Development Discussion <www-math@w3.org>

Message-ID: <i7hbm2391g.fsf@hilbert.math.albany.edu>

Date: Thu, 20 May 2010 11:08:43 -0400

To: W3C MathML Development Discussion <www-math@w3.org>

Message-ID: <i7hbm2391g.fsf@hilbert.math.albany.edu>

I'm looking at the commutative diagram in the page http://www.w3.org/Math/testsuite/build/main/TortureTests/Complexity/complex1-full.xhtml The diagram is effected with an mtable having 3 cells in each of 3 rows. It seems that the markup effect of the reference image is intended to be achieved using <mspace height="100px" width="150px"/> in the middle cell rather than leaving the middle cell empty. Is this a normative technique? It works very well in one browser that I'm looking at and is rather grotesque in another (on a different platform with different fonts). It would seem better to be able to specify arrow lengths. As to what "works" now, the rendering of this diagram will, I think, be acceptable on both of these platforms if (1) the middle cell is left empty and (2) long horizontal arrows, i.e., U-27F5 and U-27F6 are used. -- BillReceived on Thursday, 20 May 2010 15:09:14 UTC

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