A Simpler Version of the Pythagorean Curvature Correction Theorem
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I have been trying to hone the actual equation down and I think I finally have the complete version. While a2+b2+h(a2b2/R2)=c2 works great... it's not as easy to use... this new theory fixes some of the ambiguity. Table of Contents Introduction Spherical and Hyperbolic Pythagorean Theorems Spherical: Exact Law of Cosines Spherical: Taylor Expansion Hyperbolic: Exact Law of Cosines Hyperbolic: Taylor Expansion Summarizing the Curvature‐Corrected Formulas Rigorous Checks of the Expansion Order Estimates and Neglected Terms Consistency with Euclidean Limit Geometry of “Proper Triangles” vs. “Right Triangles” Gauss–Bonnet and Angle/Area Proofs Gauss–Bonnet in 2D Relationship to the Sides a , b , c a,b,c Scissor Congruences and Area Comparisons Connecting to Spin‐ 1 2 \tfrac12 The Rotation Group S O ( 3 ) SO(3) vs. Its Double Cover S U ( 2 ) SU(2) Sign Flip for a 2 π 2\pi Rotation: Proof from Group Theory Geometric Interpretation: S 2 S^2 (Bloch...