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Square Image Of Or Equal To (⊑)
⊑ 𝕩: First
First element of 𝕩.
⊑ ⟨1, 2, 3⟩
a ← 3‿3 ⥊ ↕9
⊑ a
𝕨 ⊑ 𝕩: Pick
Pick the element of 𝕩 at index 𝕨.
2 ⊑ ⟨1, 2, 3⟩
b ← 3‿3 ⥊ ↕9
2‿0 ⊑ b
