For a set to be a subset of another set, it implies that all its elements are all found in the other set. A subset is denoted by the symbol;
Ϲ = subset of
Ȼ = not a subset of
For example; if A= (1, 2, 3, 4, 5, 6, 7) and B= (1, 2, 3) then B C A.
N.B. every set is a subset of itself. Symbols used in identifying a set include;
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Symbols
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Meaning
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( ) or φ
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Empty set
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C
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Subset of
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Ȼ
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Not a subset of
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E
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Element of
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Ɇ
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Not an element of
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