Question: Do both directors of films Let's Be Evil and The Music Master (film) share the same nationality?

In mathematics, in the field of ordinary differential equations, the Sturm – Picone comparison theorem, named after Jacques Charles François Sturm and Mauro Picone, is a classical theorem which provides criteria for the oscillation and non-oscillation of solutions of certain linear differential equations in the real domain. Let,, be real- valued continuous functions on the interval and let be two homogeneous linear second order differential equations in self- adjoint form with and Let be a non-trivial solution of( 1) with successive roots at and and let be a non-trivial solution of( 2). Then one of the following properties holds. The first part of the conclusion is due to Sturm( 1836), while the second( alternative) part of the theorem is due to Picone( 1910) whose simple proof was given using his now famous Picone identity. In the special case where both equations are identical one obtains the Sturm separation theorem. <SEP> The film stars Isabelle Allen, Jamie Bernadette, Kara Tointon, Elliot James Langridge, and Elizabeth Morris, and focuses on Jenny, who—having been tasked with caring for a sick parent in need of expensive meds—is starting a brand- new job as a chaperone in a program for gifted youths. The film was one of the special screenings at Slamdance Film Festival 2016. Let's Be Evil is a 2016 British science fiction- horror film directed by Martin Owen and written by Elizabeth Morris, Martin Owen, and Jonathan Willis. The film was produced by Posterity Pictures, and was theatrically released on 5 August 2016 by IFC Midnight. <SEP> He studied at the Royal Academy of Music. He was principal horn of the Royal Philharmonic Orchestra( RPO) 19982008. In 2008, he was appointed principal horn of the BBC Symphony Orchestra. He often plays guest principal horn with the major London orchestras, and others including the Berlin Philharmonic Orchestra and the Chamber Orchestra of Europe. He also has a varied solo career outside the orchestra and appears as soloist and chamber musician in some of the leading music festivals around the world. Martin Owen( born 22 September 1973) is a British classical horn player. He is a regular performer at the Wigmore Hall; he made his debut there in 1997 in Benjamin Britten's" Serenade for Tenor, Horn and Strings" with Philip Langridge and Guildhall Strings. He has since performed the same work there with Toby Spence and the Scottish Ensemble. That collaboration led to a recording for Linn Records, of which Paul Driver said in the Sunday Times," Owen's playing is a luxury for the ear". Other recordings include Mozart's Horn Concerto No. 4 with the RPO( RPO Classics label), Schubert's Octet with among others Michael Collins( Wigmore Hall Live label), Roderick Elms'" Four Seasonal Nocturnes" with the RPO( Dutton Records), and Franz Danzi's" Symphonie Concertante" with the Cadaqués Orchestra. In October 2006, Owen gave the world premiere of Malcolm Arnold's" Burlesque" for horn and orchestra, with the RPO. The work, a recently recovered fragment, is thought to be part of an uncompleted horn concerto. Recent performances include Schumann's" Konzertstück" for Four Horns and Orchestra with the BBC Philharmonic Orchestra at the 2007 BBC Proms, Britten's" Serenade" at the 2008 Bad Kissingen festival with the BBC Symphony Orchestra, and the London premiere of Elliott Carter's Horn Concerto at the Barbican Centre with the BBC Symphony Orchestra conducted by Oliver Knussen, for the composer's 100th birthday. In 2009, he performed Knussen's Horn Concerto with the BBC Symphony Orchestra at the BBC Proms live on BBC Four TV and on BBC Radio 3. In 2006, he was awarded a Fellowship by the Royal Academy of Music. He has been professor of horn there since 2008. Martin Owen is represented by Worldwide Artists Management. <SEP> Allan Dwan (3 April 1885 – 28 December 1981) was a pioneering Canadian-born American motion picture director, producer, and screenwriter. <SEP> Mr. Right is a 2009 British film directed by David Morris and Jacqui Morris. The jointly- made gay- themed film is the debut for both directors. <SEP> The Music Master is a 1927 American silent drama film directed by Allan Dwan and written by Philip Klein, adapted from the play of the same name by David Belasco. The film stars Alec B. Francis, Lois Moran, Neil Hamilton, Norman Trevor, Charles Willis Lane and William T. Tilden. The film was released on January 23, 1927, by Fox Film Corporation.