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 May 1 comment True or False: $\exists x(P(x)\lor Q(x))\equiv \exists xP(x)\lor \exists yQ(y)$ looks OK. math.stackexchange.com/questions/755373/… is related Feb 11 awarded Notable Question Feb 1 awarded Yearling Jan 22 awarded Explainer Oct 19 revised Turning this double sum with Kronecker delta into a single sum - am I correct? Typo in title, conventional notation for floor function Oct 19 suggested approved edit on Turning this double sum with Kronecker delta into a single sum - am I correct? Oct 19 revised If $0 \in P$ and $\sup\{x \in [0,1] : [0,x] \subseteq P\} = 1$, then $[0,1] \subseteq P$? (What if adding 3rd assumption?) added 333 characters in body Oct 18 comment If $0 \in P$ and $\sup\{x \in [0,1] : [0,x] \subseteq P\} = 1$, then $[0,1] \subseteq P$? (What if adding 3rd assumption?) Oh, sorry, what does [0,1[ mean? Is it the same as [0,1)? Oct 18 comment If $0 \in P$ and $\sup\{x \in [0,1] : [0,x] \subseteq P\} = 1$, then $[0,1] \subseteq P$? (What if adding 3rd assumption?) But you have defined $P$ as $[0,1]$ which contains 1, so 1 $\in P$. Oct 18 answered If $0 \in P$ and $\sup\{x \in [0,1] : [0,x] \subseteq P\} = 1$, then $[0,1] \subseteq P$? (What if adding 3rd assumption?) Oct 15 awarded Tenacious Mar 31 awarded Custodian Mar 31 reviewed Approve Find Where the Function $3x^4-4x^3-12x^2+5$ is Increasing and Decreasing Mar 31 answered Find Where the Function $3x^4-4x^3-12x^2+5$ is Increasing and Decreasing Feb 13 accepted How many 5-character passwords can be made from 5 characters with joins? Feb 13 comment How many 5-character passwords can be made from 5 characters with joins? Thanks. Is the total therefore 3125 + 5000 + 6000/4 = 9625? Feb 13 accepted What is probability that a sample covers all classes? Feb 13 answered What is probability that a sample covers all classes? Feb 1 awarded Yearling Jan 31 comment what does $p(-1) = 0$ mean? is there a function p(x) defined anywhere else in the question?