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feat: Close the smallest pendulum configuration-space sorryful definitions #1327

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jstoobysmith merged 2 commits into from
Jul 13, 2026
Merged

feat: Close the smallest pendulum configuration-space sorryful definitions #1327

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feat: Close the smallest pendulum configuration-space sorryful defini…
NicolaBernini Jun 30, 2026
8640cf6
Use Real.Angle for sliding pendulum angle
NicolaBernini Jul 1, 2026
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20 changes: 16 additions & 4 deletions Physlib/ClassicalMechanics/Pendulum/SlidingPendulum.lean
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Expand Up @@ -5,7 +5,7 @@ Authors: Shlok Vaibhav Singh
-/
module

public import Physlib.Meta.Linters.Sorry
public import Mathlib.Analysis.SpecialFunctions.Trigonometric.Angle
/-!
# Sliding Pendulum
### Tag: LnL_1.5.2
Expand Down Expand Up @@ -63,9 +63,21 @@ namespace ClassicalMechanics

namespace SlidingPendulum

/-- The configuration space of the sliding pendulum system. -/
@[sorryful]
def ConfigurationSpace : Type := sorry
/-!
## A. Configuration space
-/

/--
The configuration space of the sliding pendulum system.

The generalized coordinates are the horizontal position of the support mass and the angle
that the string makes with the vertical.
-/
structure ConfigurationSpace where
/-- The horizontal position `x₁` of the support mass. -/
supportPosition : ℝ
/-- The angle `φ` that the string makes with the vertical. -/
angle : Real.Angle

end SlidingPendulum

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