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Trevor3
  • Member for 10 years, 10 months
  • Last seen more than a week ago
  • United Kingdom
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4
Properties of trace-class operators
Jul 7, 2015
3
Coercivity of sesquilinear form
Apr 20
2
Anything equivalent to Rank-nullity theorem in infinite dimensions?
Nov 15, 2023
1
Compactness of the product of a compact operator and an unbounded one
Feb 21, 2017
1
Relationship between $L_\infty$ and $L_2$ norms in time-domain and frequency-domain
Aug 8, 2017
1
Expansion in power series of a fraction
Mar 9, 2021
1
Proof of relative compactness of a linear operator
Jul 25, 2021
1
Is a dissipative closed operator maximal dissipative?
Sep 5, 2023
1
Prove that $A+B$ with $A^{-1}$ compact and $B$ $A$-compact is Fredholm with index zero
Nov 15, 2023
1
Skew-symmetric differential operator in $L_2$
Aug 14, 2025