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template<typename _MatrixType>
Index FullPivLU< _MatrixType >::nonzeroPivots (  ) const [inline]
the number of nonzero pivots in the LU decomposition. Here nonzero is meant in the exact sense, not in a fuzzy sense. So that notion isn't really intrinsically interesting, but it is still useful when implementing algorithms.
See also:

Definition at line 129 of file FullPivLU.h.

      ei_assert(m_isInitialized && "LU is not initialized.");
      return m_nonzero_pivots;

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