pm#function_quantity_type function that maps from one or more instances of constant_quantity to another instance of constant_quantity; for example, the velocity of a particle would be represented by a function_quantity mapping values of time (which are constant_quantities) to values of distance (also constant_quantities); note that all instances of function_quantity are functions with a fixed arity; note too that all elements of the range of a function_quantity have the same physical dimension as the function_quantity itself
closed_exclusion: sumo#constant_quantity
supertype: sumo#physical_quantity (sumo) pm#function_type
equal: sumo#function_quantity (pm)
subtype: pm#unary_constant_function_quantity_type unary function that maps from sumo#constant_quantity to the same class
subtype: pm#time_dependent_quantity_type a unary_constant_function of continuous time; all instances of this class map a time quantity into another constant_quantity such as temperature; for example, 'the temperature at the top of the Empire State Building' is a time_dependent_quantity since its value depends on the time
subtype: sumo#calorie
subtype: sumo#British_thermal_unit
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