89 reputation
8
bio website qwertjsblog.altervista.org
location Modena, Italy
age 17
visits member for 9 months
seen 5 hours ago

I'm an high school student interested in computer science, mathematics, physics and sci-fi series! Not so nerd, actually. Cheers!


Sep
10
comment Replace x with -1 in $ y' = \frac 32({1+x^\frac 23})^\frac 12 \ ({\frac 23 x^\frac {-1}3}) $
Where is the square root? I see only cubics
Aug
16
comment Problems that become easier in a more general form.
Great example! Really neat
Aug
10
revised Is there a basic “unit” of measurement in math
MatJaX formatting, spelling corrections
Aug
10
suggested suggested edit on Is there a basic “unit” of measurement in math
Aug
9
comment The unofficial definition of Group.
Closure doesn't imply associativity: the 4th statement says a composition of actions is still an action but doesn't say anything about the order and how it affect the resulting action
Aug
2
comment Find side BC of a triangle given AB, AC, and a relation between $\angle A$ and $\angle B$
If it makes sense, then it's fine. Maybe you are searching for a more elegant way, then I suggest you to report your solution and specify your new requirement
Jul
27
comment Polygons with equal area and perimeter but different number of sides?
that's not a rectangle, and not even a 4-sided polygon because its sides must be non-adjacent
Jul
27
comment Polygons with equal area and perimeter but different number of sides?
love the way you solve it!
Jul
25
answered How can I determine the function for summing a series of integers?
Jun
5
comment Series Question: $\sum_{n=0}^\infty\frac{2n!}{(2n+1)!!}=\pi$
Beautiful proof!
Jun
5
comment 'Obvious' theorems that are actually false
Oh I see your point
Jun
5
comment 'Obvious' theorems that are actually false
Why is this wrong?
May
29
revised When is the power of a binomial equal to the sum of like powers of its terms?
added 9 characters in body
May
29
revised What does this limit verification say?
Wrong variable in limit
May
21
accepted What does this limit verification say?
May
21
comment What does this limit verification say?
That's a perfectly good point. Thank you! Very helpful
May
21
revised What does this limit verification say?
MathJax improvement (consistency with question)
May
21
comment What does this limit verification say?
For $\varepsilon \geq 2$ doesn't the inequality lose sense? $n$ would be complex
May
21
comment What does this limit verification say?
@SantiagoCanez yes, I know it.
May
21
suggested suggested edit on What does this limit verification say?