algebraic symbols?

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in algebra what does U mean when its turned 90 degrees clockwise, WITHOUT a line under it, my pc doesnt have these symbols for some reason

2006-08-28 12:06:34 · 2 answers · asked by leader_of_the_four_horsemen 1 in Education & Reference ➔ Homework Help

A is a subset of (or is included in) B, denoted by A ⊆ B,
B is a superset of (or includes) A, denoted by B ⊇ A.

2006-09-01 01:05:10 · answer #1 · answered by Ambi 3 · 0⤊ 0⤋

Is a subset of?
(Could it be?)

2006-08-28 19:10:27 · answer #2 · answered by Goddess of Grammar 7 · 0⤊ 0⤋