Mathematics
In mathematics, "?" commonly denotes Minkowski's question mark function. In equations, it can mean "questioned" as opposed to "defined".
- U+225F ≟ questioned equal to
- U+2A7B ⩻ less-than with question mark above
- U+2A7C ⩼ greater-than with question mark above
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Famous quotes containing the word mathematics:
“... though mathematics may teach a man how to build a bridge, it is what the Scotch Universities call the humanities, that teach him to be civil and sweet-tempered.”
—Amelia E. Barr (1831–1919)
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