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1 Introduction
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2 The SDSS DA WD sample and the mass estimates with the
evolutionary model
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3 Sample completeness and selection effect correction
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4 Luminosity function of SDSS DA WDs
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5 Mass function and space density of SDSS DA WDs
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6 The formation rate of SDSS WDs
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7 Three-dimension distribution function and the H-R diagram
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8 Discussion and summary
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References
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