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theorem proved term proof

winding_plus_self

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formal statement (Lean)

 115theorem winding_plus_self {D : ℕ} (axis : Fin D) :
 116    winding_number [LatticeStep.plus axis] axis = 1 := by

proof body

Term-mode proof.

 117  simp [winding_number, step_displacement]
 118
 119/-- Winding number of a single minus-step along the measured axis is -1. -/

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