The curvature constant is a constant (k) appearing in the Robertson-Walker metric which determines the curvature of the spatial geometry of the universe. The three standard Friedmann models have: k > 0 for positive curvature (spherical geometry), k < 0 for negative curvature (hyperbolic geometry), and k = 0 for zero curvature (flat geometry).
Related entry cosmological model
Related category COSMOLOGY
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