What are the roles of the signs "De", "q", "R" and what are they supposed to mean to Q? Evidently, "De" is a constant name that refers to a particular function, "q" is a variable name that makes a PIR to a collection of signs, and "R" is a variable name that makes a PIR to a collection of sign relations. | What are the roles of the signs "De", "q", "R" and what are they supposed to mean to Q? Evidently, "De" is a constant name that refers to a particular function, "q" is a variable name that makes a PIR to a collection of signs, and "R" is a variable name that makes a PIR to a collection of sign relations. |