![notation - Does anyone know what this musical symbol means? - Music: Practice & Theory Stack Exchange notation - Does anyone know what this musical symbol means? - Music: Practice & Theory Stack Exchange](https://i.stack.imgur.com/M2JGJ.png)
notation - Does anyone know what this musical symbol means? - Music: Practice & Theory Stack Exchange
![Pierre Boulez – Boulez Conducts Boulez: Le Marteau Sans Maitre / Livre Pour Cordes (1973, Vinyl) - Discogs Pierre Boulez – Boulez Conducts Boulez: Le Marteau Sans Maitre / Livre Pour Cordes (1973, Vinyl) - Discogs](https://i.discogs.com/0E75f1NftOqJsRywlqWD8re8BnomEKIocApfbZz_TX0/rs:fit/g:sm/q:90/h:600/w:587/czM6Ly9kaXNjb2dz/LWRhdGFiYXNlLWlt/YWdlcy9SLTI2OTI3/MzItMTI5NzM2MDQ3/Ny5qcGVn.jpeg)
Pierre Boulez – Boulez Conducts Boulez: Le Marteau Sans Maitre / Livre Pour Cordes (1973, Vinyl) - Discogs
![Pierre Boulez's Le Marteau sans maître | A Guide to the Moldenhauer Archives | Articles and Essays | The Moldenhauer Archives - The Rosaleen Moldenhauer Memorial | Digital Collections | Library of Congress Pierre Boulez's Le Marteau sans maître | A Guide to the Moldenhauer Archives | Articles and Essays | The Moldenhauer Archives - The Rosaleen Moldenhauer Memorial | Digital Collections | Library of Congress](https://www.loc.gov/static/collections/moldenhauer-archives/images/pierre-boulez-2.png)
Pierre Boulez's Le Marteau sans maître | A Guide to the Moldenhauer Archives | Articles and Essays | The Moldenhauer Archives - The Rosaleen Moldenhauer Memorial | Digital Collections | Library of Congress
![Boulez conducts Boulez, Ensemble Intercontemporain – Le Marteau Sans Maître | Dérive 1 & 2 (2005, Digipak, CD) - Discogs Boulez conducts Boulez, Ensemble Intercontemporain – Le Marteau Sans Maître | Dérive 1 & 2 (2005, Digipak, CD) - Discogs](https://i.discogs.com/uoVKAPoR9OzZUmTKfe1UKbxNbl-Y9AvKt1EC1Wm-d_0/rs:fit/g:sm/q:90/h:526/w:600/czM6Ly9kaXNjb2dz/LWRhdGFiYXNlLWlt/YWdlcy9SLTE0Nzg0/ODAwLTE1ODE1NDM3/MTEtNDY0Ni5qcGVn.jpeg)