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Rd;dhanos sye

ऋद्धनोः स्ये ONPANINI 72070

/sya gets /iT after R ऋ and han हन्.

As /sya is a soft, it gets /iT after /seT roots anyway by ArdhadhAtuk.... So this sUtra only affects /aniT roots, like kR कृ and han हन्.

After /aniT roots, a soft, like /tumun or /kta, does not get /iT —

han हन् + /tumun → !**hantum हन्तुम्

kR कृ + /tumun → **kartum कर्तुम्

But /sya does —

kR कृ + /lRT /tip → **kariSyati करिष्यति

kR कृ + /lRG /tip → **akariSyat अकरिष्यत्

han हन् + /lRT /tip → !**haniSyati हनिष्यति

han हन् + /lRG /tip → ahaniSyat अहनिष्यत्

Details —

kR कृ + /lRT /tip
→ kR कृ + /sya + /tip by syatAsIlRl...
→ kR कृ + iSya इष्य + /tip by this rule and /Satvam
→ kar कर् + iSya इष्य + /tip by gbS
→ !**kariSyati करिष्यति

kR कृ + /lRT /tip
→ !**kariSyAmi करिष्यामि with !! like **pacAmi पचामि

kR कृ + /lRG /tip → **akariSyat अकरिष्यत्