उदितो वा

Operational rule vidhi

The affix क्त्वा optionally gets the इट् augment after a root which has an indicatory short उ.

Word by word (padaccheda)

Left context उदितः pañcamī · ekavacanaIndeclinable वा avyaya

Left context Pañcamī (5th case): "after X", the operation applies to what follows (1.1.67 तस्मादित्युत्तरस्य). Also used for limits and sources.
Indeclinable An avyaya such as च "and", वा "optionally", न "not".

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Full reading

उदितः वा

Pāṇini leaves out words that carry over from earlier sūtras. Expand to see the rule as a reader actually understands it.

Commentary

The affix क्त्वा optionally gets the इट् augment after a root which has an indicatory short उ।
As शमु - शमित्वा or शान्त्वा; तमु - तमित्वा or तान्त्वा; दमु -दमित्वा or दान्त्वा ॥

Śrīśa Chandra Vasu, The Ashtadhyayi of Panini (1897), via ashtadhyayi.com.