The proper symbol to denote proper subset
By Emma Payne •
⊂ and ⊃ symbols
Some authors use the symbols ⊂ and ⊃ to indicate subset and superset respectively; that is, with the same meaning and instead of the symbols, ⊆ and ⊇
Other authors prefer to use the symbols ⊂ and ⊃ to indicate proper (also called strict) subset and proper superset respectively; that is, with the same meaning and instead of the symbols, ⊊ and ⊋.
Whether we should use ⊂ or ⊊ to represent the proper (strict) subset? Which symbol have more use?
(Folks, most of the time I work with languages. I'm not a mathematician at all. Just in case.)
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