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Barratt Park

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09 Sep 2009 Wigner3j symbol Wigner3j( J123, M123) calculates the Wigner 3j symbol. Author: Kobi

Instead of returning zero when the triangle rule abs(j1-j2)<=j3<=(j1+j2) or the projection addition rule m1+m2=m3, this program instead returns an error message. In my opinion this is not how a Three-J script should work, since many programers will want to apply a Three-J even in cases where it is trivially zero. The script should be modified to return zero when the Three-J is trivially equal to zero.

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