Groupoid vs Null - What's the difference?
groupoid | null |
(algebra) A magma: a set with a total binary operation.
(algebra, and, category theory) A set with a partial binary operation that is associative and has inverses and identities.
A non-existent or empty value or set of values.
Zero]] quantity of [[expression, expressions; nothing.
Something that has no force or meaning.
(computing) the ASCII or Unicode character (), represented by a zero value, that indicates no character and is sometimes used as a string terminator.
(computing) the attribute of an entity that has no valid value.
One of the beads in nulled work.
(statistics) null hypothesis
Having no validity, "null and void"
insignificant
* 1924 , Marcel Proust, Within a Budding Grove :
absent or non-existent
(mathematics) of the null set
(mathematics) of or comprising a value of precisely zero
(genetics, of a mutation) causing a complete loss of gene function, amorphic.
As nouns the difference between groupoid and null
is that groupoid is (algebra) a magma: a set with a total binary operation while null is zero, nil; the cardinal number before einn.groupoid
English
Noun
(en noun)- A groupoid is a category in which every morphism is an isomorphism.
External links
* (wikipedia "groupoid")null
English
Noun
(en noun)- (Francis Bacon)
- Since no date of birth was entered for the patient, his age is null .
Adjective
(en adjective)- In proportion as we descend the social scale our snobbishness fastens on to mere nothings which are perhaps no more null than the distinctions observed by the aristocracy, but, being more obscure, more peculiar to the individual, take us more by surprise.