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Proof step 3 from proof ecs-write (previous step)

⊦ ecs(wlar[m, wle], # wlar[m, wle]) = (m < # wlar ⊃ (ecs(wlar) -- wlar[m].ec) ++ wle.ec;ecs(wlar))

Heuristic simplifier applied rule simplifier

And obtained the following new goals

Proof step 4:
⊦ ecs(wlar[m, wle], # wlar) = (m < # wlar ⊃ (ecs(wlar) -- wlar[m].ec) ++ wle.ec;ecs(wlar))

Rule argument

Additional information

Used simplifier rules: ⊦ # wlar[n, wle] = # wlar; (s)