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 review and provide simplified proofs related to the Magnus expansion, andimprove convergence estimates. Observations and improvements concerning theBaker--Campbell--Hausdorff expansion are also made.  In this Part IIA, we investigate the case of $2\times2$ matrices with respectto the operator norm. We consider norm estimates and minimal presentations interms of the Magnus and BCH expansions. Some results are obtained in thecomplex case, but a more complete picture is obtained in the real case.

Convergence estimates for the Magnus expansion IIA. $2\times2$ matrices with operator norm