Projection[u, v] finds the projection of the vector u onto the vector v.Projection[u, v, f] finds projections with respect to the inner product function f.
Prolog
(Built-in Mathematica Symbol) Prolog is an option for graphics functions which gives a list of graphics primitives to be rendered before the main part of the graphics is rendered.
Properties is an option that allows specification of properties to objects and items of objects.
PropertyList[{obj, item}] lists the properties available for item in obj.
Property[item, name -> value] associates the property name -> value with item.
PropertyValue[{obj, item}, name] gives the property value associated with name for item in obj.
Proportional[x, y, ...] displays as x \[Proportional] y \[Proportional] ....
Proportion[x, y, ...] displays as x \[Proportion] y \[Proportion] ....
Protected is an attribute which prevents any values associated with a symbol from being modified.
Protect
(Built-in Mathematica Symbol) Protect[s_1, s_2, ...] sets the attribute Protected for the symbols s_i. Protect["form_1", "form_2", ...] protects all symbols whose names match any of the string patterns ...