# Definition:Projection

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## Disambiguation

This page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.

**Projection** may refer to:

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- Mapping Theory:
- Projection (Mapping Theory)
- Quotient Mapping, also known as
**projection**or**canonical projection** - Projection of Set Product

- Functional Analysis:
- Projection (Hilbert Spaces)
- Orthogonal Projection
- Idempotent Operator, to which some sources refer as a
**projection**