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Zev Chonoles earned this badge 93 times |
1h ago
Why is $2\pi i \neq 0?$
may 9 at 9:11
Is $\mathbb{R}$ the only ordered field?
apr 30 at 8:15
Passing from induction to $\infty$
apr 24 at 9:37
If $A^2$ is invertible, then $A$ is also invertible?
apr 23 at 13:31
why not just 2 charts to make atlas for sphere?
mar 6 at 18:54
Example of functions that are onto but not one-to-one
mar 3 at 6:34
Are all integers fractions?
feb 27 at 13:59
Wolfram Alpha's Mysterious Trig Abilities…
feb 26 at 2:55
Is $|1-i|$ larger than $|1|$?
dec 25 at 20:26
Uncountable closed set of irrational numbers
dec 24 at 17:35
Why is 'abuse of notation' tolerated?
dec 20 at 14:13
Computing the homology groups.
nov 30 at 1:57
Distribution of the digits of Pi
oct 11 at 15:37
Tricky SAT testproblem
aug 27 at 11:28
Extended Euclidean algorithm with negative numbers
jul 19 at 19:16
Under which conditions does $a^n \equiv 1\mod(b) \Rightarrow\ a^{n^m} \equiv 1\mod(b) $? Can you prove it?
jul 6 at 23:10
Is the set of all rationals with denominators less than $10^6$ closed in $\mathbb{R}$?
jun 16 '12 at 12:53
Is it possible for a quadratic equation to have one rational root and one irrational root?
jun 8 '12 at 1:00
Primes of the form $n\pm k$
jun 4 '12 at 1:35
Proof That $1=0$ — Why is it False?
may 30 '12 at 3:15
Can every nonsingular $n\times n$ matrix with real entries be made singular by changing exactly one entry?
may 16 '12 at 16:48
Chameleons Riddle
may 6 '12 at 20:26
Set that is not algebraic
apr 20 '12 at 0:54
Order of Cyclic Subgroups
apr 10 '12 at 20:03
If “multiples” is to “product”, “_____” is to “sum”
mar 24 '12 at 18:23
Is there is a number system which is extension of complex number system?
feb 28 '12 at 7:40
Is memorization a good skill to learn or master mathematics?
feb 27 '12 at 2:56
Finite Abelian Group
feb 13 '12 at 11:33
$B,N,H$ be subgroups of $G$, is it true that $ \langle B \cap H, N \cap H \rangle = \langle B,N \rangle \cap H $?
feb 4 '12 at 0:44
Does every set have a group structure?
jan 21 '12 at 17:01
List of Interesting Math Blogs
jan 17 '12 at 23:27
If $xy$ is a unit, are $x$ and $y$ units?
jan 16 '12 at 2:24
What is the mental-math behind this tiny bit? (If I use normal fraction calculation I get it, but mentally!)
jan 4 '12 at 2:34
Set of solutions to quadratics over $\mathbb{Q}$
dec 31 '11 at 21:54
Why do we write proofs “forward?”
dec 23 '11 at 15:34
What do you call numbers such as 100, 200, 500, 1000, 10000, 50000 as opposed to 370, 14, 4500, 59000
dec 18 '11 at 19:34
twin prime conjecture
dec 15 '11 at 6:35
Drawing a thickened Möbius strip in Mathematica
dec 3 '11 at 8:21
Grad school & success in the long run
dec 1 '11 at 8:09
Why is it that in $\mathbb{F}_q \setminus 0$, there are exactly as many squares as non-squares?
nov 23 '11 at 13:49
Proof about an infinite sum
nov 22 '11 at 2:29
Why do the $n \times n$ non-singular matrices form an “open” set?
nov 21 '11 at 3:11
I'm confused: does # mean Q.E.D. or contradiction?
