TY - JOUR AU - Carrillo, Sergio A. AU - Hurtado, Miguel TI - Appell and Sheffer sequences: on their characterizations through functionals and examples JO - Comptes Rendus. Mathématique PY - 2021 SP - 205 EP - 217 VL - 359 IS - 2 PB - Académie des sciences, Paris UR - http://www.numdam.org/articles/10.5802/crmath.172/ DO - 10.5802/crmath.172 LA - en ID - CRMATH_2021__359_2_205_0 ER -