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1 |
3. e : {a..b} 4. b-a = 0 ( i:{a..b}. e(i)) = 0 (Or i:{a..b}. e(i) = 0) | 2 steps |
2 |
3. 0<k 4. b:, e:({a..b}). 4. b-a = k-1 (( i:{a..b}. e(i)) = 0 (Or i:{a..b}. e(i) = 0)) 5. b : 6. e : {a..b} 7. b-a = k ( i:{a..b}. e(i)) = 0 (Or i:{a..b}. e(i) = 0) | 3 steps |
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