definition: |
isTaut :: Boolean -> Bool isTaut b = case b of (Or ls) -> isTaut' ls _ -> False where isTaut' [] = False isTaut' (x:xs) = containsInverted x xs || isTaut' xs containsInverted x xs = case x of (Var i) -> nv i `elem` xs (Not (Var i)) -> va i `elem` xs _ -> False |
demand: |
argument 1 |
deterministic: |
deterministic operation |
failfree: |
_ |
indeterministic: |
referentially transparent operation |
infix: |
no fixity defined |
iotype: |
{({Or}) |-> _ || ({Var}) |-> _ || ({Not}) |-> _ || ({And}) |-> _} |
name: |
isTaut |
precedence: |
no precedence defined |
result-values: |
_ |
signature: |
Dimacs.Types.Boolean -> Prelude.Bool |
solution-complete: |
operation might suspend on free variables |
terminating: |
possibly non-terminating |
totally-defined: |
reducible on all ground data terms |