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theorem proved term proof

plotEncoding_image_nonzero

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formal statement (Lean)

 157theorem plotEncoding_image_nonzero (p : BookerPlotFamily) :
 158    plotEncoding p ≠ 0 := by

proof body

Term-mode proof.

 159  cases p <;> decide
 160
 161/-- The image of `plotEncoding` is exactly the seven non-zero
 162    vectors of `F2Power 3`. -/

used by (3)

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depends on (12)

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