To put pitons into a rock/ice to facilitate climbing.
A spike, wedge, or peg that is driven into a rock or ice surface as a support (as for a mountain climber).
The action of projecting or throwing or propelling something.
A forecast or prognosis obtained by extrapolation
An idempotent linear transformation which maps vectors from a vector space onto a subspace.
Any of several systems of intersecting lines that allow the curved surface of the earth to be represented on a flat surface. The set of mathematics used to calculate coordinate positions.
The display of an image by devices such as movie projector, video projector, overhead projector or slide projector.
A belief or assumption that others have similar thoughts and experiences to one's own. This includes making accusations that would more fittingly apply to the accuser.
The image that a translucent object casts onto another object.
Something which projects, protrudes, juts out, sticks out, or stands out.
An image of an object on a surface of fewer dimensions.
A transformation which extracts a fragment of a mathematical object.
A morphism from a categorical product to one of its (two) components.
The preservation of the properties of lexical items while generating the phrase structure of a sentence. See Projection principle.