He wrote extensively about Einstein's Theory of Relatively, and corresponded with Einstein on the subject for many years. Among his notable achievements were solving of several difficult and critical equations related to Einstein's Unified Field Theory. Typed letter on Hlavaty's stationery as president of the Czechoslovak Society of Arts and Sciences in America, dated November 14, 1961, concerning a detailed reply to certain questions relating to relativity, mathematics, and electromagnetic and gravitational fields. Signed by Hlavaty in blue ink.