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# Module Union_find

### Signature

Imperative data structure for representing disjoint sets.

Union find is used to implement an equivalence relation on objects, where the equivalence relation can dynamically be coarsened by "union"ing two equivalence classes together.

All of the operations are effectively (amortized) constant time.

type
'a
t

`type 'a t`

is the type of objects, where each object is part of an
equivalence class that is associated with a single value of type `'a`

.

val
create : 'a -> 'a t

`create v`

returns a new object in its own equivalence class that has value `v`

.

val
get : 'a t -> 'a

`get t`

returns the value of the class of `t`

.

val
set : 'a t -> 'a -> unit

`set t v`

sets the value of the class of `t`

to `v`

.