VDM-10 Language Manual

VDM-10 Language Manual
A.7.6
imply = ‘=>’ ;
logical equivalence = ‘’ ;
in set = ‘in set’ ;
not in set = ‘not in set’ ;
subset = ‘subset’ ;
proper subset = ‘psubset’ ;
set union = ‘union’ ;
set difference = ‘\’ ;
set intersection = ‘inter’ ;
sequence concatenate = ‘ˆ’ ;
map or sequence modify = ‘++’ ;
map merge = ‘munion’ ;
map domain restrict to = ‘’ ;
composition = ‘comp’ ;
iterate = ‘**’ ;
Quantified Expressions
quantified expression = all expression
| exists expression
| exists unique expression ;
all expression = ‘forall’, bind list, ‘&’, expression ;
exists expression = ‘exists’, bind list, ‘&’, expression ;
exists unique expression = ‘exists1’, bind, ‘&’, expression ;
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