Of unknown authorship, it seems that it was sung as a Sabbath table-song and a festival table-song for holidays in general.

my blood pressure goes up and down

Proposition 7.4 Homothecies preserve circles. That is, for any homothecy h and any circle C, h(C) is a circle as well. […] Were we willing to do the same with homothecies, we would meet an obstruction: the composition of two homothecies is not necessarily a homothecy.

nano- + particle → nanoparticle