Michael Dement was named to replace Tom Miller as Cornell basketball coach. Miller's last three teams finished 16-10, 14-12 and 14-12, the first three consecutive winners at the Ivy League school since 1966-68. Miller quit April to become coach at the University of Colorado . . .

The Gator Bowl received a $600,000 conditional pledge from the Duval County (Fla.) Tourist Development Council to help in its search for a television network contract. ABC-TV, which has dropped its option on the Gator Bowl, paid nearly $850,000 to televise lthe game Dec. 30 . . .

The Peach Bowl has received NCAA certification for its Dec. 31 college football game even though the bowl still does not have a television contract . . .

Georgia Athletic Director Vince Dooley said he has informed the NCAA of former Bulldogs fullback Andre Smith's admission that he sold complimentary football tickets during the 1984 season. In an interview with The Atlanta Constitution this week, Smith said he sold tickets for up to $100 each. Dooley said a new NCAA rule, which prohibits players from getting tickets and substitutes a pass list instead, "has greatly reduced the possibility of violations," . . .

The University of Maryland women's lacrosse team shocked top-ranked Penn state (10-1) with seven first-half goals, then held on for an 11-6 victory over the Nittany Lions Thursday. The eight-ranked Terrapins (7-4) scored four times in the first eight minutes, including three goals by junior attacker Carin Petersen.