Did composers Stravinisky know DeBussy and Ravel?

Yes. Igor Stravinsky, Claude Debussy, and Maurice Ravel were all prominent composers during the late 19th and early 20th centuries and were part of the same musical circle in Paris. They knew each other and had varying degrees of influence on one another's work.

Stravinsky first met Debussy in 1902 when he moved to Paris. Debussy was already a well-established composer and Stravinsky admired his music greatly. Debussy took an interest in Stravinsky's early works and offered him guidance and encouragement.

Stravinsky also had a close relationship with Ravel. They first met in 1909 and became friends and frequent collaborators. They exchanged ideas and techniques and influenced each other's musical style. Stravinsky and Ravel had a mutual respect for each other's work and their friendship lasted until Ravel's death in 1937.