Venerable Khenchen Palden Sherab Rinpoche dpal ldan shes rab was a scholar and lama in the Nyingma school of Tibetan Buddhism particularly well known for his texts and teachings on Dzogchen He was a close student of Dudjom Rinpoche and a frequent collaborator with his brother Khenpo Tsewang Dongyal, with whom he taught regularly in upstate New York.