> ⋚ U+22DA LESS-THAN EQUAL TO OR GREATER-THAN > ⋛ U+22DB GREATER-THAN EQUAL TO O...

Nadya · on April 13, 2022

https://en.wiktionary.org/wiki/%E2%8B%9A

> If the function f is differentiable and concave, then f′(x1)⋚f′(x2) as x1⋛x2. That is f′(x1) and f′(x2) have the opposite relation as x1 and x2.

bialpio · on April 13, 2022

This blew my mind:

"Related terms

    ⋛ (synonymous when used on its own, but antonymous when used jointly)"

a_shovel · on April 13, 2022

Perhaps "has a comparison relation to"? So for any two numbers x and y, x ⋚ y is true, but "square ⋚ pentagon" is false.

skykooler · on April 13, 2022

More concretely, it's true only for real numbers - so -4 ⋚ 7 is true, but 3+2i ⋚ 5 is false.

vermarish · on April 13, 2022

When I was learning statistical hypothesis testing, I once wrote notes that looked like "H_0: mu ⋚ a <--> p-value: P(T(X) ⋛ T(a))", although I didn't include the equal-to bar.

mkl · on April 13, 2022

That sounds like a different symbol: ≶ U+2276

There are lots of similar symbols: ≶≷≸≹⋚⋛⪋⪌⪏⪐⪑⪒⪓⪔