2:20 AM
This turned up in review audit (which I failed). I had tried to close this as PSQ because frankly speaking I did not understand anything at all. Questions from advanced topic should contain context so that mere mortals like me can figure out something.
Had a bad day with review audits. Failed 2 and passed the last one.

7 hours later…
9:41 AM
@ParamanandSingh It's a borderline PSQ with just a definition given. I'm in favour of closure
(there is also the option to skip as a last resort)

4 hours later…
1:21 PM
-5

Consider A in this equation: $\frac1{1-A}= \frac1{1-\lim_{n\to 1}n}$ So, A=$lim_{n\to 1}n$ =? Is A>1, A=1 or A<1 ? A can be 1, 1.000...1, or 0.999... But the definition of limit says n approaches 1 but can not be 1, I think the definition already recognizes the existence of infinitesimal. So...

2 hours later…
3:35 PM
This programming exercise is completely off-topic – one more vote needed to make it deletable.

3 hours later…
6:40 PM
Useless wrong answer. (Also, the username and style are identical to another crank, so probably it's a sockpuppet.)

7:07 PM
[ SmokeDetector | MS ] Repeating characters in body (69): Please help me, please help me, please help me by unipaci on math.SE

4 hours later…
10:49 PM
@user21820 gone!