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DOUBLE PRECISION FUNCTION D1MACH (I)
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c this is not the original one from slatec
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double precision const(5)
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DATA const(1) / 2.23D-308 /
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DATA const(2) / 1.79D+308 /
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DATA const(3) / 1.11D-16 /
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DATA const(4) / 2.22D-16 /
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DATA const(5) / 0.301029995663981195D0 /
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C***FIRST EXECUTABLE STATEMENT D1MACH