VA SAVOIR - THE MUSICAL SCORE

THIS IS A SHOT IN THE DARK. AS THE CREDITS ROLL AT THE BEGINNING OF THE FILM A PIANO PLAYS A BALLET THEME AS IF IN THE DANCE STUDIO SEEN LATER. THE THEME IS REPEATED LATER AS WELL, BUT DOES NOT SEEM TO BE IDENTIFIED ANYWHERE. I'M GUESSING IT IS WELL KNOWN TO DANCE ENTHUSIASTS, PERHAPS. CAN ANYONE TELL ME WHAT THIS MUSIC IS?