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Izidor Hafner
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Demonstrations 561  580 of 821
Futoshiki Generator
Advanced Space Visualization Test
Cylindrical Mazes on Surfaces
Kakuro Product Puzzle
Kakuro Puzzle
Mazes on a Torus
Two Points on a Polyhedron
Grouping the Faces That Belong to the Same Vertex of a Polyhedron
Mazes on Polyhedra
Mazes on Surfaces
The Sum of the Sines of a Sum and Difference of Two Angles
Structure of Double Triacontahedron
Flexible Frame
Double Rhombic Icosahedron
Polyhedron Faces Identification
Find the Number of Cubes Removed
Fourfold Triacontahedron
Threefold Rhombic Triacontahedron
Constructing the Regular Icosahedron
Counterexamples to Euler's Formula for Nonconvex Polyhedra
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