Where does “piecewise linear” come from?
piecewise linear (English) comes from English piecewise, from English piece, from Middle English pece, from Old French piece, from Vulgar Latin pettia, from Latin pettia, from Gaulish pettyā, from Proto-Celtic kʷezdis — piece, portion.
piecewise linear (English): Equal to a sum of finitely many linear functions, each defined on a convex polytope: said of functions between vector spaces
Definitions
- Equal to a sum of finitely many linear functions, each defined on a convex polytope: said of functions between vector spaces
Ancestry of “piecewise linear”, step by step
piecewise linear traces back through two separate lines of ancestry.
via English piecewise
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | piecewise | In terms or by means of pieces; a piece at a... |
| 2 | English | piece | A part of a larger whole, usually in such a form... |
| 3 | Middle English | pece | piece; morsel; bit |
| 4 | Old French | piece | piece, bit, part; circa 1170, Chrétien de Troyes |
| 5 | Vulgar Latin | pettia | piece, portion |
| 6 | Latin | pettia | piece, portion |
| 7 | Gaulish | pettyā | — |
| 8 | Proto-Celtic | kʷezdis | piece, portion |