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Single Idea 13911

[from 'Beginning Logic' by E.J. Lemmon, in 4. Formal Logic / C. Predicate Calculus PC / 2. Tools of Predicate Calculus / a. Symbols of PC ]

Full Idea

I define a 'symbol' (of the predicate calculus) as either a bracket or a logical connective or a term or an individual variable or a predicate-letter or reverse-E (∃).

Gist of Idea

The 'symbols' are bracket, connective, term, variable, predicate letter, reverse-E

Source

E.J. Lemmon (Beginning Logic [1965], 4.1)

Book Reference

Lemmon,E.J.: 'Beginning Logic' [Nelson 1979], p.139