theorem extracted_formal_statement_83 : sign 0 * |0| = 0 := sorry

State before:
case pos
x : ℝ
xpos : x ≤ 0
xzero : x = 0
⊢ x.sign * |x| = x

Tactic: rw [xzero]

State after:
[case pos
 x : ℝ
 xpos : x ≤ 0
 xzero : x = 0
 ⊢ sign 0 * |0| = 0]

Relevant lemmas: