topical slide(s): creative technology / new media / game development(s)

$size( %a(s). elems ) < %a(s).bound$
$=>$ $length( s.items ) < s.limit$
$s' = << s.items \. i, s.limit >>$
$=>$ $%a(s')$ $=$ $<< %a(s).elems \uplus { i }, %a(s).bound >>$