The New Encyclopædia BritannicaEncyclopædia Britannica, 1983 - Encyclopedias and dictionaries |
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Page 42
... rule of [ uniform ] substitution ) . A further important principle is the rule of substitution of equivalents . Two wff's , a and ẞ , are said to be equiva- lents when a = ẞ is valid . ( The wff's a and ẞ are equiva- lents if and only ...
... rule of [ uniform ] substitution ) . A further important principle is the rule of substitution of equivalents . Two wff's , a and ẞ , are said to be equiva- lents when a = ẞ is valid . ( The wff's a and ẞ are equiva- lents if and only ...
Page 60
... rule , Chrysippus these principles were represented by means of standard inferences or by inference schemata . The following sche- mata are said to have been set out by Chrysippus as inde- monstrable : The inference schemata of Compari ...
... rule , Chrysippus these principles were represented by means of standard inferences or by inference schemata . The following sche- mata are said to have been set out by Chrysippus as inde- monstrable : The inference schemata of Compari ...
Page 653
... rule , a rule consist- ing of graduated scales , each movable , and by means of which simple calculations may be carried out mechani- cally . In ordinary slide rules these operations include mul- tiplication , division , and extraction ...
... rule , a rule consist- ing of graduated scales , each movable , and by means of which simple calculations may be carried out mechani- cally . In ordinary slide rules these operations include mul- tiplication , division , and extraction ...
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