Map

The word map could refer to:

• In general mathematics, a "map" is any function from one set to another. For more information, see Wikipedia: Map (mathematics).

• In regular temperament theory, the term "map" is used in the more specific sense of a linear map, which, informally, can be thought of as a function that can be represented by a matrix. Examples include tuning maps, projection maps (sometimes called projection matrices), and temperament maps (usually called "temperament mapping matrices", or "mapping matrices" or even just "mappings" for short). In the past, the terms "M-map" and "V-map" were also sometimes used to refer to temperament mappings and subgroup basis matrices, although the terminology has since changed on this wiki. A rank-1 temperament mapping is also called a val.

• Douglas Blumeyer and Dave Keenan recommend reserving the word "map" for a mapping with one row, so that all maps are mappings but not all mappings are maps; a simple tip to remember this usage is that the shorter word refers to the simpler object.