Talk:Solutions 9
From 15th ISeminar 2011/12 Operator Semigroups for Numerical Analysis
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Comments
Problem 4
Dear Isem Team,
I think there is a typo in Problem 4: It should state that SAS^{ − 1}A is a sectorial operator (which is true), not STS^{ − 1}T.
Nevertheless, I was wondering if you meant SAS^{ − 1} is a sectorial operator. Thanks!
OrifIbrogimov 17:46, 13 December 2011 (CET)
Dear Orif, thanks! We meant of course "SAS^{ − 1} is a sectorial operator". IsemTeam 17:43, 14 December 2011 (CET)
L'viv Team
Dear L'viv Team,
your `solution' of Problem 6 works only if the semigroups commute. This is not assumed in the problem, as it is posed!
JurgenVoigt 22:08, 10 January 2012 (CET)