deriv SD cv (937) ashtadhyayi.com hei.de L 937 ETT STT a 1.2.18 ALPH OLDHOMEPAGE NEWHOMEPAGE

na ktvA seT न क्त्वा सेट् ONPANINI 12018

When /ktvA has /iT, it is not /kit.

So, before /ktvA, a /seT root like zI शी gets /guNa normally by gbS, because this rule debars the lack of /guNa enjoined by kGitica —

zI शी + /ktvA
→ zI शी + /iT + /ktvA by ArdhadhAtuk...
→ zI शी + itvA इत्वा (this itvA इत्वा is akit अकित् by this rule)
→ ze शे + itvA इत्वा by gbS
→ zayitvA शयित्वा by ecoy एचोय्

But after an /aniT root like kR कृ, the /ktvA is /kit normally, and there ain't /guNa —

kR कृ + /ktvA → kRtvA कृत्वा