Even positive definite unimodular quadratic forms over real quadratic fields (Q920133)

The Siegel mass formula for positive definite, even unimodular lattices over the ring of integers in a real quadratic field is stated, and the classification of such lattices of low rank is discussed for \({\mathbb{Q}}(\sqrt{5})\) and \({\mathbb{Q}}(\sqrt{2})\). The author and \textit{D. C. Hung} have completed the classification for rank 8 over \({\mathbb{Q}}(\sqrt{2})\) in a later paper [Math. Ann. 283, 367-374 (1989; Zbl 0643.10013)].