Recursiveness in ๐ยนโ paths through ๐ช
Recursiveness in ๐ยนโ paths through ๐ช
Kleeneโs <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="script upper O"> <mml:semantics> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi class="MJX-tex-caligraphic" mathvariant="script">O</mml:mi> </mml:mrow> <mml:annotation encoding="application/x-tex">\mathcal {O}</mml:annotation> </mml:semantics> </mml:math> </inline-formula> is recursive in some <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="normal upper Pi 1 Superscript 1"> <mml:semantics> <mml:msubsup> <mml:mi mathvariant="normal">ฮ <!-- ฮ --></mml:mi> <mml:mn>1</mml:mn> <mml:mn>1</mml:mn> </mml:msubsup> <mml:annotation encoding="application/x-tex">\Pi _1^1</mml:annotation> </mml:semantics> </mml:math> </inline-formula> โฆ