<s>
In	O
functional	B-Application
analysis	I-Application
,	O
two	O
measures	O
of	O
non-compactness	O
are	O
commonly	O
used	O
;	O
these	O
associate	O
numbers	O
to	O
sets	O
in	O
such	O
a	O
way	O
that	O
compact	O
sets	O
all	O
get	O
the	O
measure	O
0	O
,	O
and	O
other	O
sets	O
get	O
measures	O
that	O
are	O
bigger	O
according	O
to	O
"	O
how	O
far	O
"	O
they	O
are	O
removed	O
from	O
compactness	O
.	O
</s>
