130 reputation
8
bio website qwertjsblog.altervista.org
location Modena, Italy
age 18
visits member for 11 months
seen yesterday

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


Nov
26
revised Notation for Derivatives with Respect to Time
added 1 character in body
Nov
17
asked Is this identity correct?
Nov
8
comment Domain of a solution of an ODE
Well, it isn't, it's a series of segments goo.gl/2iKqlP. However check my answer edit.
Nov
8
revised Domain of a solution of an ODE
added consideration about the derivative domain
Nov
7
answered Domain of a solution of an ODE
Oct
23
comment How do I decide what problems and how many problems to do when I try to self study?
I'll skip exercises you found trivial at first sight... But maybe this isn't going to speed up your learning very much
Sep
30
comment Question about the proof that 'A graph with maximum degree at most k is (k + 1) colorable
Great example with matrices!
Sep
27
revised I can't understand logical implication
added 170 characters in body
Sep
27
answered I can't understand logical implication
Sep
22
comment What is the limit of this specific function?
How did you pass from the limit to the derivative?
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 approved 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!