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Jun
15
revised Are primes randomly distributed?
added 85 characters in body; added 249 characters in body
Jun
15
revised Are primes randomly distributed?
edited body
Jun
15
answered Are primes randomly distributed?
Jun
15
comment Definition of a monoid: clarification needed
I took a lot of time to figure out what these structures are - for now, it seems that they're just s set bundled with some rules. For some purposes, it's better to mention a monoid or a group or a field.
Jun
15
comment Definition of a monoid: clarification needed
Look this question
Jun
14
comment How to prove that $\operatorname{var}(X) = \operatorname{var}(\mathbb E(X\mid Y)) + \mathbb E(\operatorname{var}(X\mid Y))$?
You can do the following: double expectation formula. With [text](link).
Jun
14
revised How to prove that $\operatorname{var}(X) = \operatorname{var}(\mathbb E(X\mid Y)) + \mathbb E(\operatorname{var}(X\mid Y))$?
deleted 10 characters in body; edited title; edited title
Jun
14
awarded  Nice Question
Jun
14
revised What should be proved in the binomial theorem?
added 452 characters in body
Jun
13
comment Putting the table on the ground
Putting the table on the ground
Jun
13
comment Why is $n$ divided by $n$ equal to $1$?
@vsz This is an experts site, but notice that an experts site $\neq$ a site for hard questions. Read the F.A.Q. from MSE and read the F.A.Q. on MO - this one may be your fantasy place.
Jun
13
comment Mathematics Essence
For that last question, I guess its impossible to know, but it seems that there is a number sense, which is noticing the difference between a small number of objects - some animals also have this.
Jun
13
comment Self teaching Galois Theory
Weren't you Barack Obama some time ago?
Jun
12
comment Meditation and Mathematicians
Do you think that he was trying to avoid the lies from the tablecloth?
Jun
12
comment Meditation and Mathematicians
When I read "garden", I thought that it would be: Riemman found out that leaving his table and go to the garden and talk to his plants.
Jun
11
comment How to plot biconditional graphs?
Yeah. I thought about the truth tables, and would be the intersection, yes because $1\wedge 1=1$. I guess I've figured the answer, was asking just because Wolfram Alpha didn't show me the result.
Jun
11
comment Where's the error in this $2=1$ fake proof?
@user1729 Yes. But voting to close as a dupe is different of voting to close as not a real question.
Jun
11
comment Where's the error in this $2=1$ fake proof?
@Lord_Farin I even dare to speculate that those guys didn't earn the analytical badge.
Jun
11
comment Where's the error in this $2=1$ fake proof?
@Lord_Farin Well, considering that there are illegal reasons for voting to close/downvoting, one of the most chosen is because a question is stupid. I've even created a name for these guys. I've spent a lot of time looking at $(3)$ - I was certain that the problem was there when it was actually on $(2)$.
Jun
11
comment Where's the error in this $2=1$ fake proof?
We assume $x\neq y$? I didn't get it. With Bryan's answer, I've figured that $x^2-y^2=0$ and $xy-y^2=0$ and it would end as $0=0$.