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sav08:hoare_logic [2009/02/25 14:46] vkuncak |
sav08:hoare_logic [2009/03/04 11:03] vkuncak |
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| Note: weakest conditions (predicates) correspond to largest sets; strongest conditions (predicates) correspond to smallest sets that satisfy a given property (Graphically, a stronger condition $x > 0 \land y > 0$ denotes one quadrant in plane, whereas a weaker condition $x > 0$ denotes the entire half-plane.) | Note: weakest conditions (predicates) correspond to largest sets; strongest conditions (predicates) correspond to smallest sets that satisfy a given property (Graphically, a stronger condition $x > 0 \land y > 0$ denotes one quadrant in plane, whereas a weaker condition $x > 0$ denotes the entire half-plane.) | ||
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| - | Note the similarity with relation composition. | + | This is simply relation image of a set. (See [[Sets and relations#Relation Image]].) |
| {{sav08:sp.png?400x250|}} | {{sav08:sp.png?400x250|}} | ||