Columbia University said on Tuesday that it was disciplining dozens of pro-Palestinian student protesters who seized part of the school’s main library during a demonstration in early May that led to multiple arrests. Following the protest, the university began an investigation into rules violations, banned participants from the campus and placed them on interim suspension, it said. It issued its final determinations on Tuesday. Columbia said in a statement that the sanctions included probation, suspensions ranging from one year to three years, the revocation of degrees, and expulsions. It did not specify how it disciplined any individuals. “Disruptions to academic...