uction-restriction type identities, which are particularly useful for small quantum groups.
Several intriguing open questions arising from our approach will be emphasised.
<h3 id="niels-kowalzig">Niels Kowalzig<a href="#niels-kowalzig" class="floatleft sec-link">§</a></h3>
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Building on Retakh’s approach to Ext groups through categories of extensions, Schwede reobtained the well-known Gerstenhaber algebra structure on Ext groups over bimodules of associative algebras both from splicing extensions (