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The tunneling rates for scalar fields with quartic potentials in de Sitterspace in the limit of no gravitational back reaction are calculated numericallyand the results are fitted by analytic formulae.Comment: (Contours in Figure 1 corrected, two-dimensional fitting coefficient  corrected, references added.), 16 pages, KUNS 124

General solutions for tunneling of scalar fields with quartic potentials in de Sitter space