how can i write this equation f(A,B)=1/(​(|AUB)(|A|​))*Σ(aEA)(​bEB) d(a,b)

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Almas Adil
Almas Adil 2018-9-26
评论： Walter Roberson 2018-9-26
i want to create a function who calculate with equation
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Walter Roberson
Walter Roberson 2018-9-26
Does the U in AUB mean union, ∪, A∪B ? Does AUB mean the size of the set A∪B ? Does ||A| mean the size of the set A ?
Does the E in aEA mean the membership function, ∈ ? Like is it perhaps a double summation,
sum( a in A, sum(b in B, d(a,b) ) )
which is to say the sum of d over all pair-wise combinations of the elements of A and B ?

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Almas Adil
Almas Adil 2018-9-26
for all your questions above my answer is yes except d(a,b) is derivative
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Walter Roberson
Walter Roberson 2018-9-26
What does it mean to take the derivative of a value with respect to another value? The derivative of 7 with respect to 19 is not defined.
If they were sets of variable names then it could potentially make sense.

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