S. Hassi

Mathematical Physics · 2000–2020

A researcher in the Science corpus: 11 papers; trusts 21 researchers and is trusted by 3 researchers here, as inferred from the citation graph.

Subfields

• Mathematical Physics — 73 citations into it; #5,291 of 8,562 by trust here, #1,515 by citations
• Computational Theory and Mathematics — 51 citations into it; #12,077 of 12,182 by trust here, #6,798 by citations
• Applied Mathematics — 39 citations into it; #4,652 of 7,620 by trust here, #1,487 by citations
• Statistical and Nonlinear Physics — 8 citations into it

Whom S. Hassi trusts overall

Their strongest outbound trust, strongest first, inferred from their citations.

1. Olaf Post
2. M. Mitrea
3. Jussi Behrndt
4. Fritz Gesztesy
5. Christian Remling
6. Andrea Posilicano
7. M. Malamud
8. H. D. de Snoo
9. Wolfgang Arendt
10. Adrian Sandovici

Who trusts S. Hassi overall

1. Jussi Behrndt
2. H. D. de Snoo
3. Adrian Sandovici
4. Fritz Gesztesy
5. Wenhua Zhao
6. Christian Remling
7. Matthias Langer
8. M. Malamud
9. M. Mitrea

Papers from S. Hassi's perspective

Ordered by how strongly the researchers S. Hassi trusts endorse each paper. Same corpus, a different order for every researcher.

1. Boundary value problems for elliptic partial differential operators on bounded domains
2. Perturbation theory for linear operators
3. Nonlocal Robin Laplacians and some remarks on a paper by Filonov on eigenvalue inequalities
4. Self-adjoint Extensions of Restrictions
5. The Laplacian with Robin Boundary Conditions on Arbitrary Domains
6. Robin boundary value problems on arbitrary domains
7. A general boundary value problem and its Weyl function
8. Boundary triples and Weyl functions for singular perturbations of self-adjoint operators
9. On the deficiency indices and self-adjointness of symmetric Hamiltonian systems
10. A Krein-like Formula for Singular Perturbations of Self-Adjoint Operators and Applications

Their papers

• Boundary-value problems for two-dimensional canonical systems (2000) — 94 citations
• Boundary relations and generalized resolvents of symmetric operators (2006) — 114 citations
• Form sums of nonnegative selfadjoint operators (2006) — 49 citations
• Boundary Value Problems, Weyl Functions, and Differential Operators (2020) — 189 citations
• Square‐integrable solutions and Weyl functions for singular canonical systems (2011) — 49 citations
• Lebesgue type decompositions for nonnegative forms (2009) — 72 citations
• A general factorization approach to the extension theory of nonnegative operators and relations (2007) — 50 citations
• Oper. Theory Adv. Appl. (2006) — 328 citations
• Boundary relations and their Weyl families (2006) — 179 citations
• On Kreĭn's extension theory of nonnegative operators (2004) — 70 citations
• On the class of extremal extensions of a nonnegative operator (2001) — 65 citations