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				|  |  |    For example, Quaternions have a three dimensional local
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				|  |  |    parameterization. It's plus operation can be implemented as (taken
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				|  |  | -  from `internal/ceres/auto_diff_local_parameterization_test.cc
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				|  |  | -  <https://ceres-solver.googlesource.com/ceres-solver/+/master/include/ceres/local_parameterization.h>`_
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				|  |  | +  from `internal/ceres/autodiff_local_parameterization_test.cc
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				|  |  | +  <https://ceres-solver.googlesource.com/ceres-solver/+/master/internal/ceres/autodiff_local_parameterization_test.cc>`_
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				|  |  |    )
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				|  |  |      .. code-block:: c++
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