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(1979) Semiotics in Poland 1984–1969, Dordrecht, Springer.
Intensional expressions can both be expressions containing free variables and expressions which do not contain such variables. The expression E, which contains no free variables, is an intensional expression if it can be transformed into a non-equivalent expression E" by replacing one of its members by an expression which is equivalent to that member.
Publication details
DOI: 10.1007/978-94-009-9777-6_13
Full citation:
Ajdukiewicz, K. (1979)., Intensional expressions, in J. Pelc (ed.), Semiotics in Poland 1984–1969, Dordrecht, Springer, pp. 96-125.
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