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How do students who are always involved in mathematics and physics get to know about sex?
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this post was submitted on 30 Jun 2026
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I really need to refresh my set theory symbols. I haven't taken that class in... oh no... Almost 30 years
∪ is for "union", aka "disjunction for sets", ∈ is for "includes", ⊂is for "subset", don't confuse ⊂ with ⊆, which also allows for both operands to be the same set.
Difference between ∈ and ⊂ is that former takes an element and a set as operands, latter takes two sets.
What does physical exercise of bdsm leaning bottoms have to do with this
I don't believe the current paper defines a way to describe "bdsm leaning", but for "bottoms" you can easily define
x,x ∈ H, such that there exists at least oneh,h ∈ H,f(h,x) > 0and noh',h' ∈ H,f(x, h') > 0. If the second condition is not met, conventionallyxis regarded to be a "swap", if the first one is not met, we have a "top". Hope that helps.Sub-set