Quick mathematics symbology question

[Chaotic42]

Hey folks. I'm curious, what does this symbol mean? It's in between the R and the k.

It's from this website.

Thanks!

 

[memo]

i think its a definition

 

[Sukhoi]

I just consider it a 'super' equals sign. Like it's really, really equal to that with no questions.

 

[jman19]

It means "defined as."

 

[BRObedoza]

defined as

 

[Goosemaster]

Originally posted by: jman19
It means "defined as."

i.e. it really really really equals....

 

[RaynorWolfcastle]

Originally posted by: Sukhoi
I just consider it a 'super' equals sign. Like it's really, really equal to that with no questions.

😕
doesn't that symbol mean "is defined as" ?

edit: or is it just that you think that ATOT is too stupid to understand "is defined as"? 😉

 

[chuckywang]

It is read as "congruent to"

So "R is congruent to k*N_A"

Usually it's used for modular arithmetic, such as "5 is congruent to 2, mod 3"

 

[Chaotic42]

Cool, thanks a lot guys. :beer:

 

[desteffy]

this symbol can mean many things depending on the context. Here it means "is defined to be".

 

[bleeb]

Originally posted by: jman19
It means "defined as."

YUp.

 

[oneshot47]

Is the middle line supposed to be thicker or is that just me? Ive always heard it referred to as "is exactly equal to".

 

[Chaotic42]

Originally posted by: oneshot47
Is the middle line supposed to be thicker or is that just me? Ive always heard it referred to as "is exactly equal to".

MS Word has it as three lines with the same thickness as the equal sign lines.

 

[wfbberzerker]

mega equals!

 

[stinkynathan]

We use it for logical equivalence.


(A /\ B)' is logically equivalent to A' \/ B'

 

[Sukhoi]

Originally posted by: RaynorWolfcastle

Originally posted by: Sukhoi
I just consider it a 'super' equals sign. Like it's really, really equal to that with no questions.

😕
doesn't that symbol mean "is defined as" ?

edit: or is it just that you think that ATOT is too stupid to understand "is defined as"? 😉

I tried to put it in little kid terms. 🙂

 

[oboeguy]

I tend to use it as "equivalent to", whereas ":=" is my "defined as" symbol.

 

[Chaotic42]

Originally posted by: oboeguy
I tend to use it as "equivalent to", whereas ":=" is my "defined as" symbol.

Fail a lot of tests? 😛

 

[Whitecloak]

its not symbology; it's symbolism!

 

[oboeguy]

Originally posted by: Chaotic42

Originally posted by: oboeguy
I tend to use it as "equivalent to", whereas ":=" is my "defined as" symbol.

Fail a lot of tests? 😛

<sigh>I'm finishing a PhD in engineering at an Ivy League school, what do you think? I'm talking about what I do in my own proofs, silly.

 

[chuckywang]

My bad: It does mean "defined to be" because the context is a scientific equation (something to do with number of electrons in a lattice?)
In mathematics, it means "congruent to"