TeX contra TeX: a modification of the logo

Arthur Reutenauer
Paris, France
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If you look carefully at the well–known TeX logo in Computer Modern at 10pt, you will see something strange (but you may have to magnify it a lot): the lower serif of the E extends slightly of the lower left serif of the X whereas it should only touch it. This phenomenon is even clearer with the version of the logo used in the TUGboat which is somewhat different.

In a sequel to Grzegorz Murzynowski’s talk at EuroBachoTeX 2007 (“LaTeX vs. LaTeX: a modification of The Logo”) who explained how to move the A in the LaTeX logo to give it a better appearance, I would like to discuss options to modify the “TeX” part, and also place it in a historical perspective by tracing its evolution from the beginning.

[Here is an illustration of the problem]