A note on the solvability of double saddle-point problems

We derive the necessary conditions and a sufficient condition for the nonsingularity of a class of block three-by-three saddle-point problems. When it is singular, the sufficient conditions for the solvability are also discussed.

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Bibliographische Detailangaben
Veröffentlicht in:	Applied mathematics letters 2024-08, Vol.154, p.109106, Article 109106
Hauptverfasser:	Liang, Siqi, Huang, Na
Format:	Artikel
Sprache:	eng
Schlagworte:	Double saddle-point problem Nonsingular Saddle-point problem Solvability
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	We derive the necessary conditions and a sufficient condition for the nonsingularity of a class of block three-by-three saddle-point problems. When it is singular, the sufficient conditions for the solvability are also discussed.
ISSN:	0893-9659 1873-5452
DOI:	10.1016/j.aml.2024.109106