Answer the question at the end by quoting:

Lehrer was born in 1928 to a Jewish family and grew up in Manhattan's Upper East Side. Although he was raised Jewish, Lehrer became an agnostic. He began studying classical piano at the age of seven, but was more interested in the popular music of the age. Eventually, his mother also sent him to a popular-music piano teacher.
Lehrer earned his Bachelor of Arts in mathematics (magna cum laude) from Harvard University in 1946. He received his MA degree the next year, and was inducted into Phi Beta Kappa. He taught classes at MIT, Harvard, Wellesley, and the University of California, Santa Cruz.  He remained in Harvard's doctoral program for several years, taking time out for his musical career and to work as a researcher at the Los Alamos Scientific Laboratory. He was drafted into the U.S. Army from 1955 to 1957, working at the National Security Agency(NSA). (Lehrer has stated that he invented the Jell-O Shot during this time, as a means of circumventing liquor restrictions.) These experiences became fodder for songs, e.g., "The Wild West Is Where I Want to Be" and "It Makes a Fellow Proud to Be a Soldier". Interestingly, it was many years before Lehrer publicly revealed having been assigned to the NSA, since the mere 'fact-of' its existence was classified at the time: this left him in the interesting position of implicitly using nuclear weapons work as as cover story for something more sensitive.  Despite holding a master's degree in an era when American conscripts often lacked a high school diploma, Lehrer served as an enlisted soldier, achieving the rank of Specialist Third Class (later retitled "Specialist-4" and currently "Specialist"), which he described as being a "corporal without portfolio." In 1960, Lehrer returned to full-time studies at Harvard, but in 1965 gave up on his mathematical dissertation about the subject of modes in statistics, after working on it intermittently for 15 years.  From 1962, he taught in the political science department at the Massachusetts Institute of Technology (MIT). In 1972, he joined the faculty of the University of California, Santa Cruz, teaching an introductory course entitled "The Nature of Mathematics" to liberal arts majors--"Math for Tenors", according to Lehrer. He also taught a class in musical theater. He occasionally performed songs in his lectures, primarily those relating to the topic.  In 2001, Lehrer taught his last mathematics class (on the topic of infinity) and retired from academia. He has remained in the area, and in 2003 said he still "hangs out" around the University of California, Santa Cruz.

What did he study at Harvard?

mathematical dissertation about the subject of modes in statistics,

IN: Thomas Andrews Hendricks (September 7, 1819 - November 25, 1885) was an American politician and lawyer from Indiana who served as the 16th Governor of Indiana (1873-77) and the 21st Vice President of the United States (1885). Hendricks represented Indiana in the U.S. House of Representatives (1851-55) and the U.S. Senate (1863-69). He also represented Shelby County, Indiana, in the Indiana General Assembly (1848-50) and as a delegate to the 1851 Indiana constitutional convention. In addition, Hendricks served as commissioner of the General Land Office (1855-59).

In 1872 Hendricks was elected as the governor of Indiana in his third bid for the office. An indication of Hendricks's growing national popularity occurred during the presidential election of 1872; the Democrats nominated Horace Greeley, the Liberal Republican candidate. Greeley died soon after the election, but before the Electoral College cast its ballots; 42 of 63 Democratic electors previously pledged to Greeley voted for Hendricks.  Hendricks served as governor of Indiana from January 13, 1873 to January 8, 1877, a difficult period of post-war economic depression following the financial Panic of 1873. Indiana experienced high unemployment, business failures, labor strikes, and falling farm prices. Hendricks twice called out the state militia to end workers' strikes, one by miners in Clay County, and one by railroad workers' in Logansport.  Although Hendricks succeeded in encouraging legislation enacting election and judiciary reform, the Republican-controlled legislature prevented him from achieving many of his other legislative goals. In 1873 Hendricks signed the Baxter bill, a controversial piece of temperance legislation that established a strict form of local option, even though he personally had favored a licensing law. Hendricks signed the legislation because he thought the bill was constitutional and reflected the majority view of the Indiana General Assembly and the will of Indiana's citizens. The law proved to be unenforceable and was repealed in 1875; it was replaced by a licensing system that Hendricks had preferred.  One of Hendricks's lasting legacies during his tenure as governor began with discussion to fund construction of a new Indiana Statehouse. The existing structure, which had been in use since 1835, had become too small, forcing the growing state government to rent additional buildings around Indianapolis. Besides its size, the dilapidated capitol building was in need of major repair. The roof in the Hall of Representatives had collapsed in 1867 and public inspectors condemned the building in 1873. The cornerstone for the present-day state capital building was laid in 1880, after Hendricks left office, and he delivered the keynote speech at the ceremony. The new statehouse was completed eight years later and remains in use as Indiana's state capitol building.

When did he become Govenor?

OUT:
In 1872 Hendricks was elected as the governor of Indiana in his third bid for the office.