Ekadhipatya Shodhana

Definition

Ekadhipatya Shodhana — the same-lord, or single-ownership, reduction — is the second of the two steps that clean up an Ashtakavarga, the one you run after the Trikona Shodhana. It works on the pairs of signs that share one planetary lord, adjusting or removing their figures by rules that turn on whether each sign is occupied and which sign carries the larger number. The figures it leaves behind then feed the Pinda computation that follows.

In Tradition

These classical and modern Jyotish sources agree on the scope: the reduction touches only the signs a single planet owns as a pair. The Sun and Moon sit it out, since each rules just one sign — Leo for the Sun, Cancer for the Moon — so their numbers are left untouched.

In Practice

You run Ekadhipatya Shodhana as the second of the two Ashtakavarga reductions, after the Trikona Shodhana, on the five pairs of signs that each share a single lord — working through those lords from Mars onward. Leo and Cancer drop out, because the Sun and Moon don't co-own a pair. In Kapoor's BPHS rendering you take the step only when both of a planet's signs have picked up a number after the Trikona stage, and the result turns on which of the two signs are occupied and which holds the larger figure. The reduced figures then carry forward into the Pinda Sadhana and, following Jataka Parijata, into the Ayurdaya (lifespan) computation.

Historical Origin

The reduction is set down in the classical Sanskrit literature — the Brihat Parasara Hora Sastra ascribed to Maharshi Parasara (Ch.68, in Kapoor's rendering) and Vaidyanatha Dikshita's Jataka Parijata (Ch.10). The modern writer Raman lays it out as well, in his Hindu Predictive Astrology (Ch.XXVI).

Further Reading

• Maharshi Parasara, Brihat Parasara Hora Sastra
• Vaidyanatha Dikshita, Jataka Parijata
• Raman, Hindu Predictive Astrology