It is common to represent propositional constants by , , and , propositional variables by , , and , and schematic letters are often Greek letters, most often , , and .
رایج است که ورتنده های گزاره ای را با formula_1, formula_2 و formula_3 و متغیر های گزاره ای را با formula_4 , formula_5 و formula_6 نشان دهند.