\subset means "strict subset" whereas \subseteq means "subset or equal".--For example, ~({1,2,3} \subset {1,2,3}) but {1,2,3} \subseteq {1,2,3}.StephanOn 14 Nov 2019, at 10:21, AmirHossein SayyadAbdi <amir.ahsa.2011@xxxxxxxxx> wrote:Hi Everyone,What is the difference between \subset and \subseteq in TLA+? Is it about (dis)allowing the empty subset?AmirHossein--
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