🌐EnglishEnglishDeutschEspañolFrançaisItalianoNederlandsPortuguêsSvenskaРусский中文日本語EntityQ75919· pop 10· linked from 13 articlesFranz RellichAustrian mathematician (1906–1955)Person · Open LibraryWorks5Top worksPerturbation theory of eigenvalue problemsSpectral theory of a second-order ordinary differential operatorPerturbation theory of eigenvalue problemsvia Open Library + WikidataMusic · MusicBrainzTypePersonCountryATActive from1797-01-31Active to1828-11-19via MusicBrainz · CC0Recent publications · Crossref5 total works indexedG*Power 3: A flexible statistical power analysis program for the social, behavioral, and biomedical sciences · 2007 · cited 53,033xStatistical power analyses using G*Power 3.1: Tests for correlation and regression analysesAvailable in 9 languagesFrançaisDeutschРусскийPortuguêsItalianoCatalanEgyptian ArabicHebrewvia Wikidata sitelinks · CC0ConnectionsMonge–Ampère equationEntityDresdenEntityCategories1906 births1955 deaths20th-century Austrian mathematiciansAcademic staff of the University of GöttingenAustrian emigrants to GermanyMathematical physicistsMathematicians from Austria-HungaryPeople from Tramin an der WeinstraßeUniversity of Göttingen alumni