Bari theorem

GPTKB entity

Statements (11)
Predicate Object
gptkbp:instanceOf gptkb:mathematical_concept
gptkbp:appliesTo gptkb:Hilbert_spaces
gptkbp:concerns basis in Hilbert space
orthonormal systems
gptkbp:field functional analysis
https://www.w3.org/2000/01/rdf-schema#label Bari theorem
gptkbp:namedAfter gptkb:Nina_Bari
gptkbp:state A complete minimal system in a Hilbert space is a basis if and only if it is both a Bessel system and a total system.
gptkbp:yearProposed 1951
gptkbp:bfsParent gptkb:Soviet_school_of_topology
gptkbp:bfsLayer 8