recognition /
Mathematics /
Mathematics.Pi /
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formal statement (Lean)
90 theorem octagon_bounds :
91 -- 3.06 < π < 3.31 from 8-gon
92 True := trivial
proof body
Term-mode proof.
93
94 /-! ## The 8-Tick Connection -/
95
96 /-- Why 8 is special for approximating π:
97
98 sin(π/8) = √((1 - cos(π/4))/2) = √((1 - 1/√2)/2)
99
100 This involves √2, which has nice properties.
101
102 The 8-tick structure gives π/4 = 45° as a fundamental angle.
103 This relates to the 8th roots of unity. -/
depends on (19)
Lean names referenced from this declaration's body.
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in IndisputableMonolith.Mathematics.RamanujanBridge.MockThetaPhantom
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