With no experience of ET mathematicians, we haven’t got much to go on. But, let’s take a look at a few of the ways ET maths could take different approaches from ours, or be hard for us to understand…
He also has posted a slightly edited version of this answer at his Science 2.0 blog: Maths From An Extra Terrestrial Civilization - What Could It Be Like - And Would We Understand It?
Also interesting from this author and somehow related with the previous answer: How Easy Would It Be to Communicate with Musical ETs - as in “Close Encounters Of A Third Kind”?
Feynman diagrams depicting the different (decay-)channels for single-top-production mechanisms. The letters refer to top quarks (t), bottom quarks (b), light quarks (q: u, d, s), W bosons (W), and gluons (g). In each case, the incoming particles are shown on the left and the outgoing particles on the right of the diagram. The circles indicate the W-t-b vertex (interaction), whose coupling strength is governed by the CKM matrix element Vtb.