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18 lines
298 B
Fortran
18 lines
298 B
Fortran
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real function h1(x)
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! sigma=1.0/sqrt(2.0)
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sigma=1.0
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xlim=sigma/sqrt(6.0)
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ax=abs(x)
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sgnx=1.0
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if(x.lt.0) sgnx=-1.0
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if(ax.le.xlim) then
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h1=x
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else
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z=exp(1.0/6.0 - (ax/sigma)**2)
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h1=sgnx*sqrt(6.0)*sigma*(2.0/3.0 - 0.5*z)
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endif
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return
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end function h1
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