* correction to "semigroupoid algebras" remark
@ 2005-11-26 14:58 Topos8
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From: Topos8 @ 2005-11-26 14:58 UTC (permalink / raw)
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In my comment on Miles' post which surveyed current terminology I said:
"The algebra closure in the weak operator topology then defines the
"semigroupoid" C star algbera. Of course this algebra does contain one idempotent for
each object, but this is a consequence of taking the algebra- closure of the
set of patial isometries defined by the arrows. "
The last sentence is incorrect. I have to stop associating "... oid" with
invertibility.
Carl
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2005-11-26 14:58 correction to "semigroupoid algebras" remark Topos8
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