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\section{Introduction}  Stellar magnetic fields are routinely observed through their Zeeman spectroscopic signature.  Magnetic flux can be inherited from the gas cloud from which the star is formed or can be generated by a dynamo.  A fraction of about 5-10\% of main sequence A stars shows is observed to have  large scale, predominantly dipolar magnetic fields that with amplitudes in the range 0.3-30kG. These fields  show little or no time evolution and amplitudes evolution. The existence of stable configuration for stellar magnetic fields  in radiative regions has been   and therefore thought to be inherited from  the range 0.3-30kG. star formation process (fossil fields). The existence of stable configurations  Whether the observed magnetic field is inherited from the formation process or generated by a contemporary dynamo,