[Imprint]
[Data Privacy Statement]
[E-Mail]
View
long theorem info
. View
the proof
. Back to
main index
. View
the specification
. View
theorem base summary
, View
theorem base listing
, the
used properties by spec
, the
dependency list
, the
symbol table
,
Proof step 9 from proof butmin-ins (
previous step
)
⊦ a ∈ s ∧ a ≠ b → (s -- b) ++ a = s -- b
A spec-lemma