Question: Who did V. D. Krishnaswami work with that died in 1976?
Sentence (from "Rouben V. Ambartzumian"): Victor Hambardzumyan, in his book "A Life in Astrophysics", wrote about the work of Rouben V. Ambartzumian, "More recently, it came to my knowledge that the invariance principle or invariant embedding was applied in a purely mathematical field of integral geometry where it gave birth to a novel, combinatorial branch."
Relevant evidence: No