in the next section, is that the form of Eq. ([genform]{}) gives the value of each entry of the Yukawa matrix that has a leading effect on a mass or a mixing angle. If the entry is larger than the value shown it will give a mass or mixing angle in conflict with the measured value. If the entry is smaller it will only contribute to measureable quantities at subleading order.

In the previous section we showed that, for the case of hierarchical textures, the Kähler corrections only contribute to the Yukawa matrix elements suppressed relative to the order shown in Eq. (\[genform\]) by at least ${\mathcal{O}}(\epsilon ^{2}).$ For example we can see that a zero in $Y_{11}$ is never filled by any other element. In the same way a zero in $Y_{12}$ or $Y_{21}$ is only filled by a non-zero entry in $Y_{11}$. Taking into account the constraints from the determinant of the Yukawa matrix, $Y_{11}\leq \epsilon ^{4}$ and in the hierarchical case with $N_{i\neq
j}^{L(R)}\leq \epsilon $ this implies that they can only be filled at ${\mathcal{O}}(\epsilon ^{5})$. In the same way $Y_{13}$ $Y_{31}$ and $Y_{22}$ can only be filled at ${\mathcal{O}}(\epsilon ^{4})$ ($Y_{12},Y_{21}\leq
\epsilon ^{3}$). Finally a 