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Talk:Greek alphabet

In J. W. S. Cassels, An Introduction to the Geometry of Numbers. Berlin: Springer-Verlag (1997) p. VIII, there is the notation ${\displaystyle \Delta (S)}$ but the S is a glyph variant I just can't identify, "for the lattice-constant ... of a set S," the S again being that variant. Alonso del Arte 21:53, 6 November 2010 (UTC)
In MathWorld, they use ${\displaystyle \scriptstyle \eta \,}$ instead of ${\displaystyle \scriptstyle \mu \,}$ (?) — Daniel Forgues 02:32, 31 December 2010 (UTC)
I am not yet familiar with the topic (I should look more into it,) so I can't answer for now. I just did a quick search and found that MathWorld uses ${\displaystyle \scriptstyle \eta \,}$. Where did you see that they used ${\displaystyle \scriptstyle \mu \,}$? — Daniel Forgues 08:43, 31 December 2010 (UTC)