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1953 – 1957
studied composition with Prof. Ján Cikker at the Academy of Performing Arts in Bratislava
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1957 – 1960
studied music education and Slovak language at the Teacher’s Training College and Faculty of Letters in Bratislava
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1960 – 1968
taught at the Secondary School for Teachers in Modra
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1968 – 1986
taught at the Teacher’s Training College of the Comenius University in Trnava
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1969 – 1972
studied composition with Prof. Ctirad Kohoutek at the Janáček Academy of Music and Performing Arts in Brno
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1973 – 1975
studied experimental composition with Prof. Alois Piňos at the Janáček Academy of Music and Performing Arts in Brno
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1974
achieved PhDr. degree at the Faculty of Letters of the Šafárik University in Prešov
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since 1986
acts as a lecturer at the Faculty of Pedagogy of the Comenius University in Bratislava
“Gahér in his extensive and wide-ranging genre work reflects a diverse means of expression, which is always given by a theme, or by the individual makeup of each of his compositions. Gahér uses both strict and free twelve-tone methods, different construction practices, and free styles derived from vocally respective sound parameters.”
(JURÍK, Marián: Jozef Gahér. In: 100 slovenských skladateľov. Ed. Marián Jurík, Peter Zagar. Bratislava : Národné hudobné centrum, 1998, p. 99 – 100.)