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b[i] 5.2
 
b[i]←0, b[i]←1 1.2-3.5
 
b +.f c 3
  f: × < ≤ = ≠ ≥ > ∧ ∨ ⍲ ⍱
 
m∧.=v, m≡⍤1⊢v, v≡⍤1⊢m 7
 
⍋b, ⍒b 1-1.7