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Jul
26
awarded  Enlightened
Jul
26
answered Why the action of $\mathrm{Gal}(\overline{\mathbb Q}_p/\mathbb Q_p)$ on $\overline{\mathbb Q}_p$ restricts to $\overline{\mathbb Q}$?
Jul
26
comment Probability of two heads in a sequence of coin flips
@Rhys The other question requested an answer "ASAP!!!!" so maybe this is not homework but an ongoing exam?
Jul
26
comment Probability of two heads in a sequence of coin flips
Instead of adding a Thank You to this question, you might have upvoted and/or accepted whatever you considered helpful among the answer to your otehr question ...
Jul
26
awarded  Nice Answer
Jul
26
answered Show that $\frac{a+b}{1 + ab} < 1$ for $a,b < 1$
Jul
26
revised Show the graph is Jordan region with volume 0
added 50 characters in body
Jul
26
answered Show the graph is Jordan region with volume 0
Jul
26
answered How does one find the Zariski closure of a set?
Jul
25
answered Show $f(x) = x\ln (1 + \frac{a}{x})$ is increasing when $x>0$ for any $a>0$ without using derivatives
Jul
25
answered Why is $\phi : \operatorname{Hom}(\mathbb{Z},G) \to G$ given by $ f \mapsto f(1)$ surjective?
Jul
25
answered Generalize multiples of $999…9$ using digits $(0,1,2)$
Jul
25
comment find formula for $P\land Q$ using $\uparrow$
@PandaDeTapas Tranlation according to "$P\uparrow Q$ means that not both of $P$ and $Q$ are true"
Jul
25
comment What's the image of $(a, b)$ under a typical $f$: $\mathbb{R}\longrightarrow\mathbb{R}$?
Whatever a generic function is, it seems that $(a,b)$ maps to a generic subset of continuum cardinality ...
Jul
25
comment Is it possible to define $x+x+x+x…x$ times?
In a way we could apply the chain rule to $\underbrace{u+u+\ldots +u}_{v}$ and need to consider $\partial \over \partial u$ as well as $\partial \over \partial v$. Even though the notation still doesn't make sense completely, for noninteger $v$ we obtain $u+v$, i.e., $2x$ as derivative
Jul
25
answered find formula for $P\land Q$ using $\uparrow$
Jul
24
comment Possible to turn any in-fix expression into post-fix with all values on one side?
Are we allowed to do 0 3 1 2 x - - or -1 3 1 2 x - x? Still, we'd get into trouble with $(1\times 2)+(3\times 4)$
Jul
24
answered Is 1 always an element in multiplicative group?
Jul
24
answered Calculate $\ln 97$ and $\log_{10} 97$
Jul
24
comment Labelled Venn-Diagram on Wolfram Alpha?
I assume that the graphic manipulation capabilities of whatever document software you use are sufficient to produce such a Venn diagram (also labelled) from scratch ...