Several days ago my email contained a surprise message -- containing a mathy poem -- from Ramandeep Johal, a theoretical physicist at IISER Mohali (Indian Institute of Science Education and Research) in northern India. I offer Johal's poem below -- a poem from his 2016 collection, The Sea of Tranquility
From One to Ten by Ramandeep Johal
Some things you find in pairs
some exist just alone.
While a trinity needs
some degree of unity,
a group of four
requires bit more.