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Jun
26
asked Sampling from a graph
Jun
26
revised how to solve $\sqrt{x^2 -2x} -x =0$?
changed to latex
Jun
18
comment Contraposition and law of excluded middle
@Materialist as far as I know (I am not an expert), the law of the excluded middle is formally equivalent to negation elimination. If we can obtain a statement without using negation elimination (i.e. without invoking $\neg\neg P \iff P$), we have proven it without making use of the law of the excluded middle. Here, we begin with, say, $(A\to B) \& \neg B$. If we can now show $\neg A$, then we've shown that $(A\to B)\to (B\to A)$. Now, assume $A$; we show that this leads to $B\&\neg B$, which allows us to conclude $\neg A$ without making use of the law of the excluded middle.
Jun
18
revised Relationship between Binomial and Bernoulli?
edited tags
Jun
18
answered Relationship between Binomial and Bernoulli?
Jun
18
answered Contraposition and law of excluded middle
Jun
18
comment Extended Monte Hall problem (Hallway)
We start with $n$ doors, and each door has $n$ doors behind it? The answer will be the same—you're not really changing the problem very much; you're just jiggling some parameters around a little bit. Now not switching wins when you select the right door and then select the right door, which happens with probability $1/n^2$. Switching wins when you select the wrong door, change to the right door, and then select the right second door, which happens with probability $\frac{(n-1)}{n}\times\frac{1}{n-1}\times\frac{1}{n}>1/n^2$. Have I interpreted your question correctly?
Jun
12
awarded  Announcer
Jun
6
revised On prime(less)ness and composite(less)ness of 1
added 542 characters in body
Jun
6
answered On prime(less)ness and composite(less)ness of 1
Jun
2
reviewed Approve suggested edit on combination GRE problem 25
Jun
2
comment What does “radical cube zero” mean?
For what it's worth, in mathematics, a "dimension" is not something that one can "enter". The dimension of a (vector) space is (roughly) the number of coordinates that it takes to fully specify a point in that space. So whatever references you've found to radical cubes (and I don't know what a radical cube is), it is doubtful that it has anything to do with entering or exiting other dimensions.
Jun
2
comment solve the equation for x
Hello, I've changed your statement of the problem to LaTeX code, which I would recommend learning to get the most out of this site. Can you check to make sure that I've translated correctly?