<s>
In	O
computer	B-General_Concept
science	I-General_Concept
,	O
a	O
synchronizer	B-Operating_System
is	O
an	O
algorithm	O
that	O
can	O
be	O
used	O
to	O
run	O
a	O
synchronous	O
algorithm	O
on	O
top	O
of	O
an	O
asynchronous	O
processor	O
network	O
,	O
so	O
enabling	O
the	O
asynchronous	B-Application
system	I-Application
to	O
run	O
as	O
a	O
synchronous	O
network	O
.	O
</s>
<s>
The	O
concept	O
was	O
originally	O
proposed	O
in	O
(	O
Awerbuch	O
,	O
1985	O
)	O
along	O
with	O
three	O
synchronizer	B-Operating_System
algorithms	O
named	O
alpha	O
,	O
beta	O
and	O
gamma	O
which	O
provided	O
different	O
tradeoffs	O
in	O
terms	O
of	O
time	O
and	O
message	O
complexity	O
.	O
</s>
<s>
By	O
using	O
a	O
synchronizer	B-Operating_System
,	O
algorithm	O
designers	O
can	O
deal	O
with	O
the	O
simplified	O
"	O
ideal	O
network	O
"	O
and	O
then	O
later	O
mechanically	O
produce	O
a	O
version	O
that	O
operates	O
in	O
more	O
realistic	O
asynchronous	O
cases	O
.	O
</s>
<s>
Alpha	O
synchronizer	B-Operating_System
:	O
This	O
has	O
low	O
time	O
complexity	O
but	O
high	O
message	O
complexity	O
.	O
</s>
<s>
Beta	O
synchronizer	B-Operating_System
:	O
This	O
has	O
high	O
time	O
complexity	O
but	O
low	O
message	O
complexity	O
.	O
</s>
<s>
Gamma	O
synchronizer	B-Operating_System
:	O
This	O
provides	O
a	O
reasonable	O
tradeoff	O
between	O
alpha	O
and	O
beta	O
by	O
providing	O
fairly	O
low	O
time	O
and	O
message	O
complexity	O
.	O
</s>
<s>
Since	O
the	O
original	O
paper	O
,	O
other	O
synchronizer	B-Operating_System
algorithms	O
have	O
been	O
proposed	O
in	O
the	O
literature	O
.	O
</s>
