A particular operator that, when applied to a function yields a function <math>x\mapsto\frac{f'(x)}{f'(x)}-\frac32\left(\frac{f(x)}{f'(x)}\right)^2</math>
Any image of that operator.
schweitzer
witzchoura
witzchoura
noun
(historical) A woman's fur-lined cloak, mantle, or pelisse with large sleeves, worn during the early 19th century.
