When does the Hessian determinant vanish identically?
Crossref DOI link: https://doi.org/10.1007/s00574-004-0004-0
Published Online: 2016-03-04
Published Print: 2004-04
Update policy: https://doi.org/10.1007/springer_crossmark_policy
Lossen, Christoph
Text and Data Mining valid from 2004-04-01