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IgnoranteX
  • Member for 5 years, 3 months
  • Last seen more than a month ago
  • Rome, Italy
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awarded
 Scholar
accepted
On Euler angles decomposition of $\mathrm{SU}(N)$
awarded
 Teacher
comment
On Euler angles decomposition of $\mathrm{SU}(N)$
@Carlo Beenakker. Sure a and b are diagonal, I forgot to mention it in the answer. I made an edit about it.
revised
On Euler angles decomposition of $\mathrm{SU}(N)$
just pointed out that a,b are diagonal
answered
On Euler angles decomposition of $\mathrm{SU}(N)$
asked
On Euler angles decomposition of $\mathrm{SU}(N)$
awarded
 Autobiographer
awarded
 Supporter
comment
Principal symbol of a non-local operator and Atiyah–Singer index formula
I didn't know about the need to be pseudolocal to work out a classical index theory. Do you have any reference (book&chapter or article) about the topic? And also, would you agree with me that these operators (at least the one in the example) don't have any principal symbol?
awarded
 Editor
revised
Principal symbol of a non-local operator and Atiyah–Singer index formula
added 105 characters in body
comment
Principal symbol of a non-local operator and Atiyah–Singer index formula
You are right. By "Hörmander symbol" I mean that the symbol is "in the class $S_{1,0}^m$ of Hörmander", using the wording of Wikipedia. I hope there is no big ambiguity in this definition.
awarded
 Student
asked
Principal symbol of a non-local operator and Atiyah–Singer index formula