tion descriptor data types, and </span><span class="obeylines-h"><span class="verb"><span 
class="cmtt-12">psb_krylov_mod</span></span></span><span 
class="cmr-12">, for interfacing with the</span>
<span 
class="cmr-12">Krylov solvers, must be also used (see Section</span><span 
class="cmr-12">&#x00A0;</span><a 
href="userhtmlsu9.html#x18-170005.1"><span 
class="cmr-12">5.1</span><!--tex4ht:ref: sec:examples --></a><span 
class="cmr-12">). </span><br 
class="newline" />
<!--l. 105--><p class="indent" >   <s