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 Yearling
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Jul
16
reviewed Leave Open how to find number of subsets which have fixed number of elements?
Jul
4
awarded  Yearling
Jun
22
comment How many symmetries does the Cauchy-Schwarz inequality have?
If it's generated by those transpositions, then $x_i$ can be swapped with $y_j$ via $(x_ix_k)(x_ky_j)$, so I don't see why it wouldn't just be $S_{2n}$.
Jun
18
awarded  Nice Question
Jun
3
reviewed Close Constructing a multiplication table for a finite field
May
31
revised Don't see the point of the Fundamental Theorem of Calculus.
corrected grammar, removed nonexpository language
May
27
awarded  Revival
May
26
comment Quaternions vs Axis angle
@AndreKR what else do you want it compared to? You should edit the wiki if find it unclear, or if you have more information. You could also write an answer here.
Apr
27
awarded  Good Answer
Apr
26
awarded  Good Answer
Mar
25
comment Why does the condition of a function being differentiable always require an open domain?
Whoa gosh, old question. My point was that if you take a function which isn't differentiable at $0$ and restrict it to $(0,1)$, then it might look just like some other function that is differentiable at $0$ (i.e. $|x|$ vs $x$). I claim that makes for a poor choice of definition because differentiability at a point ought to be consistent amongst every extension of a function around that point, not that no extensions should exist where it is differentiable.
Feb
26
revised Can someone explain Cayley's Theorem step by step?
added 7 characters in body
Feb
26
revised Can someone explain Cayley's Theorem step by step?
rolled back to a previous revision
Feb
26
revised Can someone explain Cayley's Theorem step by step?
well if we're makin stuff $\phi$ we should make it all $\phi$
Feb
7
reviewed Close Show that the equation $4x=y^2+z^2+1$ has no integer solution
Feb
7
comment Numbers $a$ that are the sum of the fractional parts $\{x^2\} + \{x\}$ for some $x$
@RobertSoupe How bout $0$ and $0$?
Feb
7
reviewed Leave Open Numbers $a$ that are the sum of the fractional parts $\{x^2\} + \{x\}$ for some $x$
Feb
6
reviewed Close Determine value $b$ in $f(x)=ab^x$ given the following data points
Feb
6
reviewed Close Measure Theoretic Probability: convergence almost surely
Feb
6
revised The degree of a polynomial which also has negative exponents.
added 4 characters in body