<s>
Superstabilization	B-Operating_System
is	O
a	O
concept	O
of	O
fault-tolerance	B-General_Concept
in	O
distributed	B-Architecture
computing	I-Architecture
.	O
</s>
<s>
Superstabilizing	O
distributed	B-Operating_System
algorithms	I-Operating_System
combine	O
the	O
features	O
of	O
self-stabilizing	B-Operating_System
algorithms	I-Operating_System
and	O
dynamic	B-General_Concept
algorithms	I-General_Concept
.	O
</s>
<s>
A	O
superstabilizing	O
algorithm	O
–	O
just	O
like	O
any	O
other	O
self-stabilizing	B-Operating_System
algorithm	I-Operating_System
–	O
can	O
be	O
started	O
in	O
an	O
arbitrary	O
state	O
,	O
and	O
it	O
will	O
eventually	O
converge	O
to	O
a	O
legitimate	O
state	O
.	O
</s>
<s>
Any	O
self-stabilizing	B-Operating_System
algorithm	I-Operating_System
recovers	O
from	O
a	O
change	O
in	O
the	O
network	O
topology	O
–	O
the	O
system	O
configuration	O
after	O
a	O
topology	O
change	O
can	O
be	O
treated	O
just	O
like	O
any	O
other	O
arbitrary	O
starting	O
configuration	O
.	O
</s>
<s>
However	O
,	O
in	O
a	O
self-stabilizing	B-Operating_System
algorithm	I-Operating_System
,	O
the	O
convergence	O
after	O
a	O
single	O
change	O
in	O
the	O
network	O
topology	O
may	O
be	O
as	O
slow	O
as	O
the	O
convergence	O
from	O
an	O
arbitrary	O
starting	O
state	O
.	O
</s>
<s>
The	O
stabilization	O
time	O
of	O
a	O
superstabilizing	O
algorithm	O
is	O
defined	O
exactly	O
as	O
in	O
the	O
case	O
of	O
self-stabilizing	B-Operating_System
algorithm	I-Operating_System
:	O
how	O
long	O
it	O
takes	O
to	O
converge	O
to	O
a	O
legitimate	O
state	O
from	O
an	O
arbitrary	O
configuration	O
.	O
</s>
<s>
The	O
superstabilization	B-Operating_System
time	O
is	O
the	O
time	O
to	O
recover	O
from	O
a	O
single	O
topology	O
change	O
.	O
</s>
<s>
Then	O
the	O
network	O
topology	O
is	O
changed	O
;	O
the	O
superstabilization	B-Operating_System
time	O
is	O
the	O
maximum	O
time	O
it	O
takes	O
for	O
the	O
system	O
to	O
reach	O
a	O
legitimate	O
configuration	O
again	O
.	O
</s>
