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Message * 4-dimensional geometry Tesseract, 3-sphere, N-sphere, Polychoron, -And He Built a Crooked House, Uniform polychoron, Fourth dimension, 24-cell, SO(4), 120-cell, Schläfli-Hess polychoron, Snub 24-cell, Cross-polytope, 600-cell - 1157679005 - 9781157679004