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Learning Point

Logic symbols

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Symbol

Symbol Name

Meaning / definition

Example

and

and

x y

^

caret / circumflex

and

x ^ y

&

ampersand

and

x & y

+

plus

or

x + y

reversed caret

or

x y

|

vertical line

or

x | y

x'

single quote

not - negation

x'

x

bar

not - negation

x

¬

not

not - negation

¬ x

!

exclamation mark

not - negation

! x

circled plus / oplus

exclusive or - xor

x y

~

tilde

negation

~ x

implies

 

 

equivalent

if and only if (iff)

 

equivalent

if and only if (iff)

 

for all

 

 

there exists

 

 

there does not exists

 

 

therefore

 

a=b b=a

because / since

 

 

 

 

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