Pi_i^{rs} = y_s delta_{ir} for r = ir, s = ic.
Pi_i^{rs} = y_s delta_{ir}, ul{y} in Y coordinates.
Pi^k = y_k, ul{y} in Y coordinates.
Define sides and corner regions for a box aligned with coordinate axes.
Parameters: | dim : int
lbn : tuple
rtf : tuple
eps : float
kind : bool, optional
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Returns: | regions : dict
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Volume of a box aligned with coordinate axes.
Parameters:
Returns:
Volume of a periodic cell in a rectangular 3D (or 2D) lattice.
Parameters: | axes : array
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Returns: | volume : float
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Get volume of a given region using integration defined by a given field. Both the region and the field have to be defined in problem.