U

u(alfa) operator
    SPDE package, 3816
U(ALFA,I) operator
    SPDE package, 3817
Unary prefix operator, 3818
union operator
    ASSIST package, 3819
    SETS package, 3820
unit operator
    PHYSOP package, 3821
unitmatrix command
    ASSIST package, 3822
unmixedradical operator
    CALI package, 3823
unmixedradical!* symbolic procedure
    CALI package, 3824
unrtr command, 3825
unrtrst command, 3826
Unset Statement, 3827
unset statement, 3828, 3829
until, 3830
untrrl command, 3831
untrrlid command, 3832
up_qratio operator
    QSUM package, 3833
upper_matrix switch, 3834
upward_antidifference, 3835
User packages, 3836