Gleb Serafimovich Sedelnikov (6 August 1944 – 10 April 2012) was a Soviet and Russian composer and poet. He was born in Moscow and died there at the age of 67.
Despite losing his sight completely by the age of nine, Sedelnikov graduated from the theory and composition department of the music college attached to the Moscow Conservatory in 1966. He then studied at the Moscow Conservatory as a musicologist, graduating in 1971 in Yuri Kholopov's class, and as a composer, graduating in 1974 in Anatoly Leiman's class. In 1979 he completed postgraduate study in composition. He became a member of the Union of Composers of the USSR in 1974.
He made his debut with works for children, particularly vocal-symphonic pieces. These included the suites The Multicolored Book and The Year Round for chorus and symphony orchestra, both written in 1970 to texts by Samuil Marshak; the cycle At the Lenin Museum, to texts by Sergei Mikhalkov, around 1969; the oratorio Song of the Falcon (1972); and the cantata Song of the Stormy Petrel for chorus, piano and percussion (1978), based on works by Maxim Gorky.
The most prominent part of Sedelnikov's later output was his chamber operas. His first, Poor Folk (1973), based on Fyodor Dostoevsky's work of the same title and with a libretto by the composer, was successfully staged by Boris Pokrovsky at the Moscow Chamber Musical Theatre. It was followed by Ilyich's Light Bulb, later retitled The Motherland of Electricity, after works by Andrei Platonov (1981), and The Bear, based on Anton Chekhov's comedy of the same name (1984).
Throughout his career, Sedelnikov also wrote extensively for voice and chamber ensemble, including songs and song cycles to poems by Alexander Pushkin, Alexander Blok, Velimir Khlebnikov, Vladimir Mayakovsky, Sergei Yesenin and Genrikh Sapgir. He published his poetry under the pseudonym Valentin Zagoryansky, formed from the names of the Moscow-area holiday settlements Valentinovka and Zagoryanskaya. His poetry included palindromes, acrostics and other forms of combinatorial poetry, published in the almanac Triton and the journals Arion and New Youth.
He was buried at Donskoye Cemetery, in closed columbarium no. 18.