loom

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def auto :
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    X1 = [1.0, 0.0],
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    X2 = [0.0, 1.0],
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    m  = 1.0
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using math {
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    print m*(X1-X2)
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    print length(X1-X2)
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    print length(X1-X2)^3
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    print m*(X1-X2)/length(X1-X2)^3
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    print m*(X1-X2)/length(X1-X2)^3-m*(X1-X2)/length(X1-X2)^3
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    def auto : X = { F : m*(X1-X2)/length(X1-X2)^3 }
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    print X
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    X["F"] -= m*(X1-X2)/length(X1-X2)^3
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    print X
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}
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