Liam Williams
Reputation
Next privilege 50 Rep.
Comment everywhere
 Nov 10 revised Using set operations to conditionally reduce a set to the empty set based on its contents deleted 3 characters in body Nov 10 awarded Informed Nov 10 revised Using set operations to conditionally reduce a set to the empty set based on its contents Clarify that $X$ and $Y$ may be used as constants in $f$; added 4 characters in body Nov 10 comment Using set operations to conditionally reduce a set to the empty set based on its contents It looks like I am not being precise enough with my language to get my point across, let me try to explain in looser terms and maybe you can help me to make it more formal. With $f$, I am interested in whether I can manipulate the input set in such a way that when the input set contains a subset of $X$, the output will be the empty set and when it does not, the output is the input set. $f(A)$ is allowed to perform operations like $X \cap A$ and so can "fill in" one of the arguments to $\cap$ with a constant, where constants can be built from $X$ and $Y$ Nov 10 comment Using set operations to conditionally reduce a set to the empty set based on its contents By "set operation" I mean unions, intersections, differences and complements Nov 10 comment Using set operations to conditionally reduce a set to the empty set based on its contents I had in mind that $X \cap Y = \emptyset$, have stated that in the question now Nov 10 revised Using set operations to conditionally reduce a set to the empty set based on its contents Made it clear that $X \neq \emptyset, Y \neq \emptyset$ Nov 9 asked Using set operations to conditionally reduce a set to the empty set based on its contents Apr 30 awarded Supporter May 23 comment Uniform distribution of survivor evaluated at lifetime Ah I see now, thanks again. May 23 accepted Uniform distribution of survivor evaluated at lifetime May 23 comment Uniform distribution of survivor evaluated at lifetime Thanks, out of interest, could you explain where my attempt went wrong? May 23 asked Uniform distribution of survivor evaluated at lifetime May 6 awarded Student May 6 awarded Scholar May 6 accepted Conditional Probability Matrices May 6 revised Conditional Probability Matrices added 11 characters in body May 6 comment Conditional Probability Matrices Ambiguous notation, I was referring to conditional probabilities in general there not the matrices. May 6 awarded Editor May 6 revised Conditional Probability Matrices added 168 characters in body