Exercices du § 6. Filtres Bourbaki sets these at the end of § 6. Filtres. 20 exercises. No solution has been written for any of them yet. Exercice 1 Exercice 2 Exercice 3 Exercice 4 Exercice 5 Exercice 6 Exercice 7 Exercice 8 Exercice 9 Exercice 10 Exercice 11 Exercice 12 Exercice 13 Exercice 14 Exercice 15 harder Exercice 16 harder Exercice 17 Exercice 18 harder Exercice 19 Exercice 20 harder