Mathematics, 14.09.2019 07:10 akatherine1738
The notion of statement form (also called well-formed qormula) can be described more carefully than in the text. start with a collection of sym- bols that we agree to call statement letters. [do not allow the symbols , ~, v, ฮป, , ใ to be in this collection.] a statement letter is a statement form of the simplest kind; and if si and s2 are statement forms, then so are ~ (s), (s) v (s), (sj ะป (sj, (, and (s1) (s2). parentheses may be omitted when confusion is unlikely but they are sometimes essential: if si is p-o and s2 is q-r.
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The notion of statement form (also called well-formed qormula) can be described more carefully than...
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