Johann Nepomuk Hummel student Adolf von Henselt
Influence
While in Germany, Hummel published A Complete Theoretical and Practical Course of Instruction on the Art of Playing the Piano Forte (1828), which sold thousands of copies within days of its publication and brought about a new style of fingering and of playing ornaments. Later 19th century pianistic technique was influenced by Hummel, through his instruction of Carl Czerny who later taught Franz Liszt. Czerny had transferred to Hummel after studying three years with Beethoven. Liszt himself idolized  the work  and influence of Hummel and often performed his works.
Hummel's influence can also be seen in the early works of Frédéric Chopin and Robert Schumann, and the shadow of Hummel's Piano Concerto in B minor as well as his Piano Concerto in A minor can be particularly perceived in Chopin's concertos. This is unsurprising, considering that Chopin must have heard Hummel on one of the latter's concert tours to Poland and Russia, and that Chopin kept Hummel's piano concertos in his active repertoire. Harold C. Schonberg, in The Great Pianists, writes "...the openings of the Hummel A minor and Chopin E minor concertos are too close to be coincidental". In relation to Chopin's Preludes, Op. 28, Schonberg says: "It also is hard to escape the notion that Chopin was very familiar with Hummel's now-forgotten Op. 67, composed in 1815 – a set of twenty-four preludes in all major and minor keys, starting with C major".
Robert Schumann also practiced Hummel (especially the Sonata in F-sharp minor, Op. 81), and considered becoming his pupil. Liszt's father Adam refused to pay the high tuition fee Hummel was used to charging (thus Liszt ended up studying with Czerny). Czerny, Friedrich Silcher, Ferdinand Hiller, Sigismond Thalberg, and Adolf von Henselt were among Hummel's most prominent students. He also briefly gave some lessons to Felix Mendelssohn.
pupil learner apprentice scholar trainee