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There are 1866 void equations (empty rows in matrix) for the variable mod1.V
at coordinates: (-2.43975e-007,3.07697e-007), (-2.45093e-007,3.05394e-007), (-2.47546e-007,3.07697e-007), (-2.47546e-007,3.04125e-007), (-2.37421e-007,3.07419e-007), ...
and similarly for the degrees of freedom (empty columns in matrix)
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