Description: The fundamental solution as an infimum is itself a solution, showing that the solution set is discrete.
Since the fundamental solution is an infimum, there must be an element ge to Fund and lt 2*Fund. If this element is equal to the fundamental solution we're done, otherwise use the infimum again to find another element which must be ge Fund and lt the first element; their ratio is a group element in (1,2), contradicting pell14qrgapw . (Contributed by Stefan O'Rear, 18-Sep-2014)
Ref | Expression | ||
---|---|---|---|
Assertion | pellfundex | |