half-line
Noun
Meaning
half-line (plural half-lines)
(geometry) ray; a line extending indefinitely in one direction from a point.
Synonyms
Hyponyms
Examples
Any value which is negative does not lie on the ray, but rather in the opposite half-line (i.e. the one starting from with opposite direction).
An example of a tree diagram is the one where each of four external lines end on an X. Another is when three external lines end on an X, and the remaining half-line joins up with another X, and the remaining half-lines of this X run off to external lines.
Each half-line had to follow one of five or so patterns, each of which defined a sequence of stressed and unstressed syllables, typically with two stressed syllables per line.
The line itself should be labelled by an arrow, drawn parallel to the line, and labeled by the momentum in the line k. The half-line at the tail end of the arrow carries momentum k, while the half-line at the head-end carries momentum −k.
The exception is when you return to the starting point, and the final half-line must be joined with the unlinked first half-line.
Then form the diagram by linking the a half-line to a name and then to the other half line.