Common hierarchical lepton mass textures for atmospheric and solar neutrino oscillations

We propose and study a common hierarchical mass texture for both charged lepton and neutrino sectors. The texture gives rise to large ${\nu }_{\mu }\leftrightarrow {\nu }_{\tau }$ mixing. Also it leads to the small angle MSW effect solution for solar neutrino data. It naturally gives a small ${\nu }_e\leftrightarrow {\nu }_{\tau }$ oscillation relevant to the CHOOZ result in certain mass limits. A special case of only four input parameters leads to a consistent solution to neutrino oscillation and lepton masses.