- program verification
- progression
- progressive (measurable) process
- projectable lattice-ordered group
- projected transformation group
- projecting cylinder
- projecting direction
- projecting direction
- projecting line
- projecting line
- projecting plane of a straight line
- projecting relative line
- projection
- projection
- projection
- projection
- projection axis
- projection center
- projection-coincidence nature of plane edge view
- projection-coincidence point
- projection from a point to a straight line
- projection from a point to a straight line
- projection from a segment to a straight line
- projection function
- projection line