U

u(alfa)operator
    SPDE package, 3816
U(ALFA,I)operator
    SPDE package, 3817
Unary prefix operator, 3818
unionoperator
    ASSIST package, 3819
    SETS package, 3820
unitoperator
    PHYSOP package, 3821
unitmatrixcommand
    ASSIST package, 3822
unmixedradicaloperator
    CALI package, 3823
unmixedradical!*symbolic procedure
    CALI package, 3824
unrtrcommand, 3825
unrtrstcommand, 3826
Unset Statement, 3827
unsetstatement, 3828, 3829
until, 3830
untrrlcommand, 3831
untrrlidcommand, 3832
up_qratiooperator
    QSUM package, 3833
upper_matrixswitch, 3834
upward_antidifference, 3835
User packages, 3836