: Received: 27 July 2020 / Approved: 29 July 2020 / Online: 3 August 2020 (00:00:00 CEST)
: Received: 21 July 2020 / Approved: 29 July 2020 / Online: 21 October 2020 (00:00:00 CEST)
We consider a multitude of topics in mathematics where unification constructions play an important role: the Yang–Baxter equation and its modified version, Euler’s formula for dual numbers, means and their inequalities, topics in differential geometry, etc. It is interesting to observe that the idea of unification (unity and union) is also present in poetry. Moreover, Euler’s identity is a source of inspiration for the post-modern poets.
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