<s>
In	O
the	O
fields	O
of	O
machine	O
learning	O
,	O
the	O
theory	O
of	O
computation	O
,	O
and	O
random	O
matrix	O
theory	O
,	O
a	O
probability	O
distribution	O
over	O
vectors	O
is	O
said	O
to	O
be	O
in	O
isotropic	B-General_Concept
position	I-General_Concept
if	O
its	O
covariance	O
matrix	O
is	O
equal	O
to	O
the	O
identity	B-Algorithm
matrix	I-Algorithm
.	O
</s>
<s>
Then	O
is	O
in	O
isotropic	B-General_Concept
position	I-General_Concept
if	O
,	O
for	O
vector	O
sampled	O
from	O
the	O
distribution	O
,	O
</s>
<s>
A	O
set	O
of	O
vectors	O
is	O
said	O
to	O
be	O
in	O
isotropic	B-General_Concept
position	I-General_Concept
if	O
the	O
uniform	O
distribution	O
over	O
that	O
set	O
is	O
in	O
isotropic	B-General_Concept
position	I-General_Concept
.	O
</s>
<s>
In	O
particular	O
,	O
every	O
orthonormal	B-Algorithm
set	I-Algorithm
of	O
vectors	O
is	O
isotropic	O
.	O
</s>
