I saw in math.stackexchange that someone uses \perp for what I always use \bot. In XeLaTeX: lost \perp in Cambria math? it says that they are two different symbols, do they just look the same?

I guess the spacing is different like in \Longleftrightarrow and in \iff, which one should be used in math?


So they use the same glyph from the same font but \perp gets the spacing for an infix relation like < whereas \bot is a mathord so gets no special spacing, like a letter x.

So either can be used in math, depending on the intended meaning.

  • 3
    For the semantics: I use \perp for "Perpendicular" and \bot for "bottom" (a contradiction in logic). – Martin Thoma Feb 18 '14 at 10:11

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