Mathamatical symbol question.

[Orionaut]

Is there a recognised symbol for "Does not always equal"

IE Sometimes it does, but not always.

Ta!

 

[-westy-]

I wouldn't have thought so, as it wouldn't really be mathematics if the result varied

 

[Randomface74]

Answer may or may not be in here:
https://en.wikipedia.org/wiki/Modal_logic

 

[peterwalkley]

Nearest I can think of is the wavy equals sign meaning "approximately equal to".

What's the context here ? As westy pointed out: mathematicians don't like multiple meanings.

 

[Rroff]

Approximately equal (squiggly over straight line - sometimes represented with a tilde but that can be a bit different as well) is probably about as close as it gets and not sure how strictly mathematical that is.

 

[dowie]

What are you actually trying to do here OP?

Are there some conditions here? You might want to make use of an indicator function.

 

[Orionaut]

Its more of a logic/philosophy thing than a strictly mathematical one.

EG A fair solution <Does not always equal> a 50/50 one"

 

[touch]

A double-lined arrow is used as "implies" ⇒
So a crossed double-lined arrow could be "does not imply":
EG A fair solution ⇏ a 50/50 one

 

[thegreysquirrel]

Could you use the " ≅ approximately equal to" or one of these meaning if and only if "↔ ⇔ ≡ ⟺".

I think it might be easier if the context is given as sometimes is not really a typical logical outcome.

 

[NVP]

Just use words

 

[Angilion]

Just use words

I agree. What the OP is talking about isn't maths. It's philosophy.

 

[jsmoke]

Yeh, need to give comtext as said.

 

[Hagar]

Logic gates are the solution

 

[ultralaser]

Just use words

most of the time means e=mc^2 but unfortunately c went for a pint down the ole' dog, so today e=m okay, Dave down the pub says it should all be reet tomorrow though init.