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what does a 4 line equal sign mean

it's in my maths book.

i searched it up and couldn't find anything. is it just a typo? lol
Original post by vix.xvi
it's in my maths book.

i searched it up and couldn't find anything. is it just a typo? lol


You mean 3 line?

That's an 'identity' sign, meaning the two sides of this relation are always the same no matter that you choose as your input.
Original post by RDKGames
You mean 3 line?

That's an 'identity' sign, meaning the two sides of this relation are always the same no matter that you choose as your input.

yeah no there's 4 lines lol
It stands for "is very equal to" for when two things are very equal
Original post by Theloniouss
It stands for "is very equal to" for when two things are very equal

srsly lol thats quite funny
thanks :smile:
I honestly don't think I've ever seen a 4 lined equal sign. The 3 lined equal sign \equiv is used e.g to mean "identically equal to", "congruent" etc.

I suspect it's probably a typo, but if you gave a little more context about where they used it we might be able to give a firmer answer.
Original post by vix.xvi
srsly lol thats quite funny
thanks :smile:

Not srsly, unfortunately 😔

Do you have a picture of it?
Original post by Theloniouss
Not srsly, unfortunately 😔

Do you have a picture of it?

its fine im pretty sure its a typo now xx thanks :smile:
Original post by vix.xvi
its fine im pretty sure its a typo now xx thanks :smile:

The Greek capital letter Xi looks like: Ξ\Xi (and is normally handwritten to just be 3 horizontal lines); if you took the expected value of it you'd get Ξ\overline {\Xi}

As somewhat of a joke, a professor once gave a talk in which the quantity Xi divided by the expected value of Xi appeared; this looks like:

ΞΞ\dfrac{\Xi}{\overline {\Xi}}
Reply 9
Original post by vix.xvi
its fine im pretty sure its a typo now xx thanks :smile:

It could mean "is really seriously equal to" in cases where it doesn't look likely that the LHS equals the RHS.
Original post by davros
It could mean "is really seriously equal to" in cases where it doesn't look likely that the LHS equals the RHS.

Lmao

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