Square Image Of Or Equal To (⊑)

⊑ 𝕩: First

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First element of 𝕩.

↗️
    ⊑ ⟨1, 2, 3⟩
1

    a ← 3‿3 ⥊ ↕9

    ⊑ a
0

𝕨 ⊑ 𝕩: Pick

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Pick the element of 𝕩 at index 𝕨.

↗️
    2 ⊑ ⟨1, 2, 3⟩
3

    b ← 3‿3 ⥊ ↕9

    2‿0 ⊑ b
6