I've been making lace for only a few years, but I think many Torchon ground sample patterns from beginning books have the ground changing along the diagonal of a triangle or diamond shape. A triangle is a simple shape that makes it easy to see the differences between the ground patterns worked on a 45 degree grid, and simpler to work when making Torchon-type laces. I would encourage you to consider the triangle design as a simple way for Veronika to demonstrate variations of lace grounds.
Sharon

-----Original Message----- Sent: Saturday, January 31, 2015 6:56 AM
Subject: [lace] RE: Mathematics and lace

... I did note, however, a very striking similarity between her bookmark pattern and the 12 inch ruler design I made and worked a few years ago <snip> but the question is as to whether halving the pattern and changing one ground is sufficient to call it a new pattern in copyright terms.
Jane Partridge

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