English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We revisit in this Note the well known Bohr-Sommerfeld quantization rule (BS)for 1-D Pseudo-differential self-adjoint Hamiltonians within the algebraic andmicrolocal framework of Helffer and Sj\"ostrand; BS holds precisely when theGram matrix consisting of scalar products of WKB solutions with respect to the"flux norm" is not invertible.

Regular Bohr-Sommerfeld quantization rules for a h-pseudo-differential operator: The method of positive commutators