#1 Polinomio característico de un operador lineal

New channel Tardes de Café y Álgebra UAM-I: title sample judged 'whole' (An academic math department channel of seminar talks, mini-courses, and numbered worked-example lecture series in algebr); passed a second screen for sellers/exam-prep/re-uploads; 0 of 3 sampled transcripts showed teaching, 0 not; titles picked one by one, checked strictly; oEmbed verified.