• The UA men's tennis team plays UNLV at 1:30 p.m. at Robson Tennis Center. Tomorrow, men's tennis plays the University of Oregon at 1:30 p.m. at Robson Tennis Center.

• The UA softball team plays a doubleheader against Stanford University at 6 p.m. in Hillenbrand Stadium. Tomorrow, the UA plays a doubleheader against UC-Berkeley at 6 p.m. in Hillenbrand.

• The UA baseball team plays USC at 7 p.m. on Sancet Field. Tomorrow, the teams face off at 1 p.m. on Sancet Field.

• Gallagher Theatre plays "Toy Story" today through Tuesday at 7:30 and 9:30 p.m. Gallagher also has a special midnight showing of "The Princess Bride." Tickets are $2.50.

• Tomorrow, new segments of the "Cat's Eye" air on Channel 4 from noon to 12:30 p.m. The show deals with the Rec Center's expansion and student voting.

• Tomorrow, attorney Paul Mitchell presents "The Constitution in Crisis," a seminar from 9 a.m. to 9 p.m. Doors open at 8 a.m. in the Student Union's Senior Ballroom. $5 donations are taken at the door.

• SoftWare Interest Group presents Joseph Garbalducci Erker speaking about "The Best of Both Worlds: Linking Matlab with Fortran and C," at 2 p.m. in Math Room 224.

• The Department of Mathematics sponsors Tai-Ping Liu, of Stanford University, speaking on "Construction and Nonlinear Stability of Shock Waves" at 4 p.m. in Math Room 501.