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@@ -55,7 +55,12 @@
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    @classmethod
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    def from_christoffels(cls, chris, parent_metric=None):
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        """
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        Get Riemann Tensor calculated from a Christoffel Symbols
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        Get Riemann Tensor calculated from Christoffel Symbols.
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        Reimann Tensor is given as:
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        .. math::
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            R^{t}{}_{s r n}=\\Gamma^{t}{}_{s n, r} - \\Gamma^{t }{}_{s r, n } +
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             \\Gamma^{p}{}_{s n}\\Gamma^{t}{}_{p r} - \\Gamma^{p}{}_{s r}\\Gamma^{t}{}_{p n}
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        Parameters
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        ----------
@@ -79,9 +84,9 @@
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            r = (int(i / dims)) % (dims)
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            s = (int(i / (dims ** 2))) % (dims)
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            t = (int(i / (dims ** 3))) % (dims)
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            temp = sympy.diff(arr[t, s, n], syms[r]) - sympy.diff(arr[t, r, n], syms[s])
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            temp = sympy.diff(arr[t, s, n], syms[r]) - sympy.diff(arr[t, s, r], syms[n])
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            for p in range(dims):
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                temp += arr[p, s, n] * arr[t, p, r] - arr[p, r, n] * arr[t, p, s]
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                temp += arr[p, s, n] * arr[t, p, r] - arr[p, s, r] * arr[t, p, n]
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            riemann_list[t][s][r][n] = sympy.simplify(temp)
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        if parent_metric is None:
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            parent_metric = chris.parent_metric
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src/einsteinpy 97.27%
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