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Topic:
Surfaces and Polygon Gluing
Worked Surface Identification Problems
Why Euler Characteristic Survives Subdivision
The Torus from a Paired Square
The Sphere from a Polygonal Disk
The Projective Plane from a Paired Polygon
The Klein Bottle from a Paired Square
The Classification Theorem for Compact Surfaces
Standard Polygon Words for Surface Types
Polygon Quotients as Surface Models
Orientation Choices Across Paired Edges
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