Glossary used in the business of art:
after – a direct imitation of an original artwork, made at a later date
assistant – someone who worked in the artist's studio
and assistants – by the artist, made with help from his assistants
associate of – by someone who had links to the artist, but was not in their studio
attributed to – thought to have been painted by the artist, but there is a degree of uncertainty
by or after – either by the artist or a direct imitation of the artist's style, made at a later date by or follower of – either by the artist or by someone who admired them and imitated their style, but was not necessarily a pupil
circle of – by an artist closely associated with the master artist, but who did not work in their studio
copy after – repetition of another artwork, generally made after the artist's lifetime, or by an artist outside their studio
copy of – repetition of another artwork
follower of – by someone who admired the artist and imitated their style, but was not necessarily a pupil
forgery – imitation of an artwork, intended to deceive
imitator of – by someone who admired the artist and their style, but was probably working at a later date
possibly – thought to be by the artist, but this is uncertain
pupil of – by someone who trained within the studio or workshop of the artist, often profoundly influenced by the artist's style
school of – in the general style or manner of
student of – by someone who trained within the studio or workshop of the artist, often profoundly influenced by the artist's style
studio of – by assistants or pupils who worked in the artist's studio, probably under the direction and guidance of the artist
and studio – by the artist, with assistance from his studio
studio copy – by pupils in imitation of the master artist. Pupils often copied the artist's most famous works in order to disseminate copies
style of – by someone who created the artwork in a manner that resembles the artist
Reference to: https://artuk.org/about/
