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sq_nonneg_real

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Posted 14 days ago · proven 14 days ago

Theorem & proof · sq_nonneg_real.lean · ✓ verified
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import Mathlib

theorem sq_nonneg_real :  x : , 0 ≤ x ^ 2 := fun x => sq_nonneg x
Referenced by
two_mul_le_sq_add_sq
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