https://forum.zmt.swiss/tags/mqsRSS for NodeThu, 18 Jun 2026 10:35:57 GMTFri, 12 Jan 2018 15:17:12 GMT60https://forum.zmt.swiss/topic/37/mqs-solver-indefinite-preconditioner-errorhttps://forum.zmt.swiss/topic/37/mqs-solver-indefinite-preconditioner-errorFri, 12 Jan 2018 15:17:12 GMT