Adjective
obvious by inspection (not comparable)
(mathematics, of a claim) evident in the mind's eye, without formal proof being necessary.
It is obvious by inspection that the set
{
[
0
,
1
)
,
[
1
,
2
)
,
[
2
,
3
)
,
.
.
.
}
{\displaystyle \{[0,1),[1,2),[2,3),...\}}
is a partition of
[
0
,
∞
)
{\displaystyle [0,\infty )}
.