projection (redirected from Projections)

projection, in psychology: see defense mechanism.

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projection

See rear-projection TV, front-projection TV and LCD panel.

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projection

1. the representation of a line, figure, or solid on a given plane as it would be seen from a particular direction or in accordance with an accepted set of rules

2. 

a. the process of showing film on a screen

b. the image or images shown

3. Psychol

a. the belief, esp in children, that others share one's subjective mental life

b. the process of projecting one's own hidden desires and impulses

4. the mixing by alchemists of powdered philosopher's stone with molten base metals in order to transmute them into gold

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(theory)

projection - In domain theory, a function, f, which is (a) idempotent, i.e. f(f(x))=f(x) and (b) whose result is no more defined than its argument. E.g. F(x)=bottom or F(x)=x. In reduction systems, a function which returns some component of its argument. E.g. head, tail, \ (x,y) . x. In a graph reduction system the function can just return a pointer to part of its argument and does not need to build any new graph.