LaTeΧ
From Why start at x, y, z
The widely used mathematical typesetting language LaTeΧ is written using a capital Greek letter chi as its final letter. In many typefaces, this is indistinguishable from a capital X.
The widely used mathematical typesetting language LaTeΧ is written using a capital Greek letter chi as its final letter. In many typefaces, this is indistinguishable from a capital X.