if ('') { $prev = 'http://'.$_SERVER['HTTP_HOST'].'/search/title:matemi- operation s.i.l.v.e.r./'; } ?> if ('' == '1') { $prev = 'http://'.$_SERVER['HTTP_HOST'].'/search/title:matemi- operation s.i.l.v.e.r./1'; } ?> if ('' && '' <= 10) { $next = 'http://'.$_SERVER['HTTP_HOST'].'/search/title:matemi- operation s.i.l.v.e.r./'; } ?>