It's a small thing, but the typography here does not quite comply with standard math typography rules (and MOS:MATH). Would the creator of this image please remove the italics from the "0" in w0, the "R" in zR, and the parentheses in w(z). It is conventional in mathematics typography for variables to be in italics, but not subscripts unless the subscripts are themselves also variables. Parentheses are never italicized.--Srleffler (talk) 03:21, 21 February 2009 (UTC)
