cross marriages, as when a brother and sister marry persons standing in the same relation to each other

The exterior derivative of a “scalar”, i.e., a function f=f(x¹,x²,...,xⁿ) where the xⁱ’s are coordinates of ℝⁿ, is df=∂f/∂x¹dx¹+∂f/∂x²dx²+...+∂f/∂xⁿdxⁿ.

There is now such an immense microliterature on hepatics that, beyond a certain point I have given up trying to integrate (and evaluate) every minor paper published—especially narrowly floristic papers.

The host of heauenly beautyes moue, / Depainted in their proper stories, / As well the fixd as wandring glories, / Which from their proper orbes not goe, / Whether they gyre swift or slowe: […]