Abels, Helmut; Pfeuffer, Christine Invariance of the Fredholm index and spectrum of non-smooth pseudodifferential operators. (English) Zbl 1489.35313 Anal. Appl., Singap. 20, No. 3, 429-464 (2022). MSC: 35S05 47A53 47G30 × Cite Format Result Cite Review PDF Full Text: DOI arXiv
Rabier, Patrick J. On the index and spectrum of differential operators on \(\mathbb{R}^{N}\). (English) Zbl 1129.47034 Proc. Am. Math. Soc. 135, No. 12, 3875-3885 (2007). Reviewer: Anatoly N. Kochubei (Kyïv) MSC: 47F05 35J45 47A53 × Cite Format Result Cite Review PDF Full Text: DOI