<div dir="ltr">



















<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif"><span style="font-size:18pt;line-height:107%">Dear
Professors Gavin &Rubel<span></span></span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif"><span style="font-size:18pt;line-height:107%"><span>     </span>Thank you very much for such a rich and fruitful
advice regarding<span>  </span>Amorphous rare earth in
addition the 4-f compounds in general is very deep task and<span>  </span>we need as you advice<span>  </span>a high<span>  
</span>computational resource to our powerful Wien2k software .<span>  </span><span></span></span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif"><span style="font-size:18pt;line-height:107%">I appreciate
your consideration, guidance, help and time.<span></span></span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif"><span style="font-size:18pt;line-height:107%">Thank you<span></span></span></p>

<p class="MsoNormal" style="margin:0in 0in 8pt;line-height:107%;font-size:11pt;font-family:"Calibri",sans-serif"><span style="font-size:18pt;line-height:107%">Sherif<span></span></span></p>





</div>