1.
Ann Intern Med
; 174(3): 432-433, 2021 03.
Artigo
em Inglês
| MEDLINE
| ID: mdl-33721541
2.
An Acad Bras Cienc
; 77(4): 589-94, 2005 Dec.
Artigo
em Inglês
| MEDLINE
| ID: mdl-16341437
RESUMO
We prove that any countable family of Lagrangian subspaces of a symplectic Hilbert space admits a common complementary Lagrangian. The proof of this puzzling result, which is not totally elementary also in the finite dimensional case, is obtained as an application of the spectral theorem for unbounded self-adjoint operators.